[GUIDE] [HOW TO] Fix VS986 dropping down to 3G/H+ from 4G LTE - Verizon LG G4

I've been working on a fix since a long time now. If you are in SD community then you prolly know me. Anyway I was able to fix this on two of my phones and it's working fine. I tested for 12 hours now. I'll also tell you in the end what problems I'm seeing. I'm also working on a fix for that.
I noticed that a service is started when the fallback happens but if I kill that service the network also dies. But if you follow the below method it safely starts a new service which kills the one that's responsible for killing the 4G/LTE
1. Upgrade your phone to 13B firmware
2. Root 13B
3. Now download Shortcut Master lite app from play store.
4. Now add these shortcuts to your favorites in the "Shortcut Master lite app". You can search for "LTE" and click on search button
LTEBandSelection
LTETestMain
LTE System Selection
CDMAPreference
5. Now click on "LTEBandSelection" and enable all the bands
6. Save and reboot
7. You now need to enable your data and turn off your wifi. Make sure your phone is in Global mode (in settings >> Mobile networks >> System select)
8. After your phone is rebooted open "Shortcut Master lite" app.
9. Now tap on LTETestMain
10. Select Click on CDMA preference.
Now choose Band preference and select "any"
P_REV_Preference ---> "MOB_P_REV 3
This is important.. EVDO Revision --> Rev A
11. "LTE Connect w/o IMS PDN" must be checked
12. Now go back to your main menu in shortcut master lit app
13. This step is very important. Changing the timeout is important. Tap on LTE System Selection
Except "Scan duration" add a couple zeros to all the other timers. For eg: T_mpsr timer (Min) is 200
The fallback timer will reset itself after reboot. But don't worry the configuration is already updated with the new value. For some reasons the shortcut master lite app is not picking it up.
14. Now finally click on "CDMA preference" in the main menu and make sure it has the value you set in Step 10
At step 10 or 13 your network should go away and your phone should complain about "no network". That's fine. just ignore the message.
Now finally reboot your phone. That's it. You should now have 4G LTE and it won't fallback to 3G or H+
The only problem is when I'm on a call my 4G LTE is dropped to 3G/H+. But after I hang up it goes back to 4G LTE after 12 seconds. I don't know if it's an expected behavior. But I'm trying to see if there is a fix for that.
I tested this with Tmobile. Make sure your APN settings are correct.

Not working for me on Cricket (AT&T). Still will always go back to H+, 4G LTE only works when I select CDMA.

konradsa said:
Not working for me on Cricket (AT&T). Still will always go back to H+, 4G LTE only works when I select CDMA.
Click to expand...
Click to collapse
I tried it on my two phones (Both tmobile). My friend just tried it on his phone. It worked for him too.

motorhead_biker said:
I tried it on my two phones (Both tmobile). My friend just tried it on his phone. It worked for him too.
Click to expand...
Click to collapse
That's great! I hope we can figure out also what we need to do to get it to work for AT&T, I am sure it's probably just some small tweaks required.

konradsa said:
That's great! I hope we can figure out also what we need to do to get it to work for AT&T, I am sure it's probably just some small tweaks required.
Click to expand...
Click to collapse
I will try it with my roomies att sim tonight. He has a nano sim, I need to find a sim adapter.

Awesome, thank you! worked for me T-mobile.
it initially didn't work but I had to turn data off then on.
It also cycles me to 2g speed for a few seconds sometimes but that may be due to poor signal in building.

pwtzz said:
Awesome, thank you! worked for me T-mobile.
it initially didn't work but I had to turn data off then on.
It also cycles me to 2g speed for a few seconds sometimes but that may be due to poor signal in building.
Click to expand...
Click to collapse
Yeah It's due to the poor signal. I got that too. You can check your signal strength using LTE discover app.
But overall it's working fine for Tmobile. I'm gonna try and fix ATT tonight.

Is 13B the main thing in the solution? I've changed these settings before on 11A and wasn't fixed. I tried these numbers on 11A and still don't work.
Also, unless a phone supports VOLTE, it'll fall back to 3G/H for calls.

eigen said:
Is 13B the main thing in the solution? I've changed these settings before on 11A and wasn't fixed. I tried these numbers on 11A and still don't work.
Also, unless a phone supports VOLTE, it'll fall back to 3G/H for calls.
Click to expand...
Click to collapse
I tried in 11A and it didn't work for me. So I guess it needs 13B.

So I tried various combinations last night for AT&T/Cricket, but I was not able to get it to work. No matter what I tried, when I had 4G LTE, voice wouldn't work and whenever voice worked, I was back to H+.
If others are reporting that T-Mobile works reliably on 4G and nobody can figure out how to make this work for AT&T, I guess it's time to switch to T-Mobile.

konradsa said:
So I tried various combinations last night for AT&T/Cricket, but I was not able to get it to work. No matter what I tried, when I had 4G LTE, voice wouldn't work and whenever voice worked, I was back to H+.
If others are reporting that T-Mobile works reliably on 4G and nobody can figure out how to make this work for AT&T, I guess it's time to switch to T-Mobile.
Click to expand...
Click to collapse
No. Hold on. I have a solution for ATT too. I tried something last night. Actually while I was working on a solution for ATT I found that we don't even have to go through the steps I mentioned in my OP to solve the problem. It boils down to invoking a service and killing a native VZW service.
The ATT solution I have works but in low signal area 4G fades and it doesn't fallback to 3G or H+. I had to recycle data to get 3G or H+.

It's Working!!!!!!!!! Thank you!!!!!!!
You just made my life much better now!
I finally have a phone which is great and also finally have good reception!
I Love U!

motorhead_biker said:
No. Hold on. I have a solution for ATT too. I tried something last night. Actually while I was working on a solution for ATT I found that we don't even have to go through the steps I mentioned in my OP to solve the problem. It boils down to invoking a service and killing a native VZW service.
The ATT solution I have works but in low signal area 4G fades and it doesn't fallback to 3G or H+. I had to recycle data to get 3G or H+.
Click to expand...
Click to collapse
Yes, that same thing happens when you switch to CDMA mode with AT&T. Voice doesn't work then (obviously), but it also doesn't fall back to H+ automatically, when you lose 4G coverage you pretty much lose signal all together.

konradsa said:
Yes, that same thing happens when you switch to CDMA mode with AT&T. Voice doesn't work then (obviously), but it also doesn't fall back to H+ automatically, when you lose 4G coverage you pretty much lose signal all together.
Click to expand...
Click to collapse
Yeah I know. I also know why that is happening. Actually I think it's a bug in the baseband firmware. But we can fix that issue by just overriding the command that was sent by baseband firmware.

ron.r said:
It's Working!!!!!!!!! Thank you!!!!!!!
You just made my life much better now!
I finally have a phone which is great and also finally have good reception!
I Love U!
Click to expand...
Click to collapse
Lol.. rep me in SD :laugh:

konradsa said:
Yes, that same thing happens when you switch to CDMA mode with AT&T. Voice doesn't work then (obviously), but it also doesn't fall back to H+ automatically, when you lose 4G coverage you pretty much lose signal all together.
Click to expand...
Click to collapse
Do you have a working fix for AT&T/Cricket? Is it different than the T-Mobile?

motorhead_biker said:
Lol.. rep me in SD :laugh:
Click to expand...
Click to collapse
Ha! You are repped!
What root did you use? and steps?
easyroot?
did you split the file and merge it back?

I must have really bad luck or something. It doesn't work for me. The Tbsr_cdma timer resets back to 2 at reboot.
Edit: Appears to be working. Nice job!

renoob said:
Ha! You are repped!
What root did you use? and steps?
easyroot?
did you split the file and merge it back?
Click to expand...
Click to collapse
Root? I just flashed the rooted sys image. That's it. instead of copying it in the FAT32 memory card just copy it to your phone's internal and you don't have to deal with split and merge stuff

If it drops out of 4G on a call then you're talking on 1X. So no video chat, no HD voice and no voice + data?

Related

quick way to toggle LTE?

Hey all --
Is there an easy to way to toggle LTE? II'd like to have a quick option to choose LTE but not to leave it on all of the time since my battery dies like 3x as fast.
I know there's the menu option that is like four menus in and requires a reboot.
SETTINGS --> MORE SETTINGS --> MOBILE NETWORKS --> NETWORK MODE
I'm hoping there's a better way.
Thanks!
I'm sure someone will eventually add it to our toggles
Sent from my SPH-L710 using xda app-developers app
As tdwp16 mentioned hopefully someone will add the toggle in. As of right now there is no easy way. That appears to be the ONLY way at the moment
Have you tried
SWITCHIT - 4G LTE TOGGLE
https://play.google.com/store/apps/...1bGwsMSwyLDEsImNvbS5icm93bmVudC5zd2l0Y2hpdCJd
jdelano said:
Have you tried
SWITCHIT - 4G LTE TOGGLE
https://play.google.com/store/apps/...1bGwsMSwyLDEsImNvbS5icm93bmVudC5zd2l0Y2hpdCJd
Click to expand...
Click to collapse
I will have to give that a shot. I have it installed on my SGS3 which is still unrooted at the moment. It at least has not Force Closed on me (like some of the reviewers complained about), but I have yet to find 4G. This is probably just do to the northern part of my area where I live missing coverage in quite a few spots.
I've decided to give this a shot. However, LTE is not available in my area so I will have no idea if it even works....
freeza said:
I've decided to give this a shot. However, LTE is not available in my area so I will have no idea if it even works....
Click to expand...
Click to collapse
Something like the old toggle for wimax 4g on the pull down menu would be most excellent... I have high hopes now that you are on the case, freeza
jdelano said:
Have you tried
SWITCHIT - 4G LTE TOGGLE
https://play.google.com/store/apps/...1bGwsMSwyLDEsImNvbS5icm93bmVudC5zd2l0Y2hpdCJd
Click to expand...
Click to collapse
i'll give it a shot and report back. thanks for the suggestion!
I have every reason that it can be accomplished natively through the settings menu.
Because, if you dial ##3282# and you go through the menus (i forgot the exact one), but it allows you to switch between different modes, LTE being one of them, on the fly without the need to reboot. So I guess all I have to do is remove the reboot option from settings and it should switch the same way that it does in the ##3282# menu.
The app noted in this thread worked for me as far as taking me to the settings but it doesnt work like a toggle does. That being said there is no LTE here in Phoenix yet so I'm screwed either way LOL We have some regular spots of 4g but I dont believe this phone works on regular 4g, unless I'm wrong??? Anyone know?
freeza said:
I've decided to give this a shot. However, LTE is not available in my area so I will have no idea if it even works....
Click to expand...
Click to collapse
No!! All your developmental resources are to be put into force roaming!!! I'm kidding... kinda
jdelano said:
Have you tried
SWITCHIT - 4G LTE TOGGLE
https://play.google.com/store/apps/...1bGwsMSwyLDEsImNvbS5icm93bmVudC5zd2l0Y2hpdCJd
Click to expand...
Click to collapse
it works! its definitely faster than having to reboot my phone after changing it through the settings menu. i hope someone comes up with a widget sometime because that'd be incredibly useful!
thanks for your suggestion
rihc55 said:
it works! its definitely faster than having to reboot my phone after changing it through the settings menu. i hope someone comes up with a widget sometime because that'd be incredibly useful!
thanks for your suggestion
Click to expand...
Click to collapse
You're welcome; I'd love to be able to use LTE - I am hoping Sprint will have better coverage in the Atlanta area soon.
jdelano said:
You're welcome; I'd love to be able to use LTE - I am hoping Sprint will have better coverage in the Atlanta area soon.
Click to expand...
Click to collapse
Yea, I am having the same issue in the northern part of Dallas. LTE is not very good here yet either for Sprint, but hopefully if they sell enough phones and get enough complaints they will break out more towers faster.
Actually I have since uninstalled the App and since then I have not been able to locate LTE at all. I tried putting it back on in an area that I had previously attained 4G and still no go. I hope that Switch It did not mess with my antenna or some such. Just wanted to put the warning out there.
LTE Toggle
freeza said:
I have every reason that it can be accomplished natively through the settings menu.
Because, if you dial ##3282# and you go through the menus (i forgot the exact one), but it allows you to switch between different modes, LTE being one of them, on the fly without the need to reboot. So I guess all I have to do is remove the reboot option from settings and it should switch the same way that it does in the ##3282# menu.
Click to expand...
Click to collapse
I don't have the SGSIII yet, since Sprint has not launched yet in my area, but I had a couple of questions.
Sounds like you are pretty knowledgeable, thanks for the info. When looking at the phone, I was surprised to see and didn't know the reason for the reboot when turning on LTE. Do you know the reason for the reboot? Is it anything logical or necessary?
I would hope that this will be something Dev's start building into their roms, unless of course there is a legitimate reason for the reboot.
Thanks!
freeza said:
I have every reason that it can be accomplished natively through the settings menu.
Because, if you dial ##3282# and you go through the menus (i forgot the exact one), but it allows you to switch between different modes, LTE being one of them, on the fly without the need to reboot. So I guess all I have to do is remove the reboot option from settings and it should switch the same way that it does in the ##3282# menu.
Click to expand...
Click to collapse
The problem with that method -- which also requires your MSL code -- is that if you use it to select LTE, it forces the handset to LTE only without 1x or EVDO. They are mutually exclusive.
This can be used to bypass the normal settings that automatically upshift and downshift between LTE and CDMA data as a threshold function of signal strength, to force LTE. But it has the side effect of killing the voice/text connectivity.

Sprint G2 LTE/3G/data in general problem

About a week ago I was using my G2 and everything was working perfectly. I then went into updates and did a PRL and Profile update and BOOM my LTE stopped working and I was forced to 3G. Now for the past 4 days or so my 3G barely works and most of the time I get no data at all. I'm even starting to get zero bars and a red x. I've tried nearly everything I can think of to remedy this issue but nothing I've done has fixed it.
I've gone into the hidden menu and enabled LTE only and the LTE comes on and works great! But...You can't just be on LTE only because then CDMA doesn't work and you can't receive calls or texts. I've also turn the phone from voice centric to data centric but then I couldnt receive calls, I could only MAKE calls.
I've done all the obvious stuff like turn my phone from global to cdma/lte and vice versa. When I reset my phone LTE will come on for 2 seconds tops then stop and push me to 3G...then after a while 3G will stop working.
I'm completely stock, not rooted.
I've talked to a guy at sprint and he's told me that they know the G2 has issues with CDMA/LTE switching
Any help would be greatly appreciated.
I have read some people say take it in and out of airplane mode to get lte back but i would think a reboot would correct the problem as well. Maybe you have a sprint tower down in your area.
Sent from the Moon using Tapatalk with my G2
I thought this was only happening to me. LoL ... Eventually I got so frustrated that I moved to TMobile.v Even when I got good connection it was still horrible if that make sense. My wife doesn't have that problem but I'm moving her to TMobile to.
Did you try to do the permanently unlock at one point? That's when it started happening to me.
RHudyCT said:
About a week ago I was using my G2 and everything was working perfectly. I then went into updates and did a PRL and Profile update and BOOM my LTE stopped working and I was forced to 3G. Now for the past 4 days or so my 3G barely works and most of the time I get no data at all. I'm even starting to get zero bars and a red x. I've tried nearly everything I can think of to remedy this issue but nothing I've done has fixed it.
I've gone into the hidden menu and enabled LTE only and the LTE comes on and works great! But...You can't just be on LTE only because then CDMA doesn't work and you can't receive calls or texts. I've also turn the phone from voice centric to data centric but then I couldnt receive calls, I could only MAKE calls.
I've done all the obvious stuff like turn my phone from global to cdma/lte and vice versa. When I reset my phone LTE will come on for 2 seconds tops then stop and push me to 3G...then after a while 3G will stop working.
I'm completely stock, not rooted.
I've talked to a guy at sprint and he's told me that they know the G2 has issues with CDMA/LTE switching
Any help would be greatly appreciated.
Click to expand...
Click to collapse
I now suffer from this... And I am rooted. I have yet to figure it out... I was going to go back to stock but sadly you have crushed my hopes (since you were stock). If anyone else suffers this and knows a fix please chime in. I've exhausted my knowledge over the last few days...
There's a dialer code you can enter to reset data and force a reactivation. It fixed some weird data issues I was having. I'll see if I can dig it up.
---------- Post added at 10:38 AM ---------- Previous post was at 09:52 AM ----------
For a site that advocates search so much, XDA's search function is absolutely horrendous. It searches wildcards before literals(good luck searching anything with a symbol) and numbers that I copied and pasted from the thread somehow show no results. But I digress...
http://forum.xda-developers.com/showthread.php?t=2523252
It's either ##UPDATE# or ##CLEAR# I can't remember which.
All I remember is that the phone showed a bunch of dialog boxes, then the phone rebooted and reactivated data. I'd assume it was ##CLEAR#, but again, not sure.
http://forum.xda-developers.com/showthread.php?p=51364046
KitKat and Data roaming: lost data connectivity notification
sent from my lg-ls980 there are many like it but this one is mine
Try ##SCRTN# This reactivates the phone and has solved data issues for me in the past.
Sent from my LG-LS980 using Tapatalk
VECTUS said:
I now suffer from this... And I am rooted. I have yet to figure it out... I was going to go back to stock but sadly you have crushed my hopes (since you were stock). If anyone else suffers this and knows a fix please chime in. I've exhausted my knowledge over the last few days...
Click to expand...
Click to collapse
Actually it's a Spark issue. The only remedy is to wait for Sprint to put out an update or disable spark. You can disable it by dialing ##data#, go into LTE - edit (you'll need your MSL. There's a dialer code to get it just look here on the forums) then disable bands 26 and 41 and set their priority to 0. Afterwards your LTE will be back to normal.
Edit - ##443336772# Shows MSL code near the bottom of the screen
It almost seems to be an LTE handoff issue - they had similar issues with other devices during the buildout here in Chicago (my poor N2 was nearly 3G for almost 6 months due to the issue. I occasionally have issues but ##SCRTN# has resolved them.
RHudyCT said:
Actually it's a Spark issue. The only remedy is to wait for Sprint to put out an update or disable spark. You can disable it by dialing ##data#, go into LTE - edit (you'll need your MSL. There's a dialer code to get it just look here on the forums) then disable bands 26 and 41 and set their priority to 0. Afterwards your LTE will be back to normal.
Edit - ##443336772# Shows MSL code near the bottom of the screen
Click to expand...
Click to collapse
I can confirm this works! Thank you! That's like the ONLY combination I hadn't tried! :good:
garwynn said:
It almost seems to be an LTE handoff issue - they had similar issues with other devices during the buildout here in Chicago (my poor N2 was nearly 3G for almost 6 months due to the issue. I occasionally have issues but ##SCRTN# has resolved them.
Click to expand...
Click to collapse
Hey G. Yeah I had actually tried that already. I'm starting to think its the ZVA modem itself is messes up... Oh well at least I got my LTE/3G back. I can live without Spark. Its hokey too...
VECTUS said:
I can confirm this works! Thank you! That's like the ONLY combination I hadn't tried! :good:
Hey G. Yeah I had actually tried that already. I'm starting to think its the ZVA modem itself is messes up... Oh well at least I got my LTE/3G back. I can live without Spark. Its hokey too...
Click to expand...
Click to collapse
You're welcome! Glad I could help!

Fix weak LTE connection in ZVD firmware

If you have noticed after the ZVD update you seem to be on 3g a lot and seem to have problems staying on LTE in locations you previously had good signals, here is a fix I shared in the ZVD update thread which seems to completely resolved the issue:
1. Obtain your MSL
2. open the dialer and enter ##data#
3. Tap LTE and select edit
4. Enter your MSL
5. Select BSRTimer (defaults to 3000) and change the value to 3
6. Press back, phone should reboot
7. Profit
*does not require root
After doing this, I'm back to nearly constant LTE connectivity, where prior to the fix I was on 3g almost every time I checked.
rocket321 said:
If you have noticed after the ZVD update you seem to be on 3g a lot and seem to have problems staying on LTE in locations you previously had good signals, here is a possible fix I shared in the ZVD update thread which seems to have complete resolved the issue:
1. Obtain your MSL
2. open the dialer and enter ##data#
3. Tap LTE and select edit
4. Enter your MSL
5. Select BSRTimer (defaults to 3000) and change the value to 3
6. Press back, phone should reboot
7. Profit
Click to expand...
Click to collapse
How do I know my MSL?
danieldp1990 said:
How do I know my MSL?
Click to expand...
Click to collapse
If you don't know it and you are running ZVC or higher, you have to use a flashtool, such as CDMA Workshop or use basic flasher and follow this guide: http://forum.xda-developers.com/showthread.php?t=2521276
You can also ask Sprint via chat or call customer service and generally they will tell you with no hassle at all.
rocket321 said:
if you have noticed after the zvd update you seem to be on 3g a lot and seem to have problems staying on lte in locations you previously had good signals, here is a possible fix i shared in the zvd update thread which seems to have complete resolved the issue:
1. Obtain your msl
2. Open the dialer and enter ##data#
3. Tap lte and select edit
4. Enter your msl
5. Select bsrtimer (defaults to 3000) and change the value to 3
6. Press back, phone should reboot
7. Profit
Click to expand...
Click to collapse
thanks man that fixed my nightmare
Since this thread has very little activity, I'm wondering if only a few of us had the issue? For those that had the problem that this fixed, did you sideload the update through adb, or take it OTA? I used adb and that makes me wonder if those who got it over the air didn't have the problem?
I think this problem affects everyone who took the ZVD update; I certainly have noticed significantly less LTE service since upgrading.
I haven't tried this fix yet since I'm often on wifi or in areas where I know there's no LTE, but I'll probably give it a shot eventually.
Edit: FYI, I took the all the updates OTA (never rooted, never installed customer recovery or ROM).
rocket321 said:
Since this thread has very little activity, I'm wondering if only a few of us had the issue? For those that had the problem that this fixed, did you sideload the update through adb, or take it OTA? I used adb and that makes me wonder if those who got it over the air didn't have the problem?
Click to expand...
Click to collapse
i have had a weak signal problem as well. i used the described way to get my MSL and it worked great. i then applied the change under the ##data# menu.
it seems to have worked great!! i will report back after a few days.
It helped, but I'm still having connectivity issues. Granted, my problem started during the zvc update, and as I'm typing this I just got dumped to 3G.
I did end up doing a full ##rtn# reset though. After everything finished I checked the BSRTimer and it was set to 1 instead of the 3 I set from the 3000
My connectivity is noticeably better though. Reps are saying the sites I'm connecting to are e/CSFB upgraded though. *shrug. Before kitkat I almost never lost LTE. Guess I just have to wait on them to install the carrier cards to deploy band 26.
At home when I hook LTE I usually run a -113 to -118.
BecomingDeath13 said:
It helped, but I'm still having connectivity issues. Granted, my problem started during the zvc update, and as I'm typing this I just got dumped to 3G.
I did end up doing a full ##rtn# reset though. After everything finished I checked the BSRTimer and it was set to 1 instead of the 3 I set from the 3000
My connectivity is noticeably better though. Reps are saying the sites I'm connecting to are e/CSFB upgraded though. *shrug. Before kitkat I almost never lost LTE. Guess I just have to wait on them to install the carrier cards to deploy band 26.
At home when I hook LTE I usually run a -113 to -118.
Click to expand...
Click to collapse
Yep this is a good point, I don't know that it's specifically supposed to be 3,but I do know 3000 was causing my phone to park on 3g almost all of the time, and now it is on LTE almost constantly (we have band 26 available here).
Even in my basement with the signal bar indicator showing zero bars I have maintained LTE.
tin foil
tin foil will boost signal
Now that this has been posted a while, (I also saw it posted over on S4GRU) and it seems to be helping a lot of people, which makes me feel good for my accidental discovery!
With that said, I have been watching the RDF page and it's still showing ZVD, which indicates to me that LG may not be working on another update yet. I was hoping for a fairly quick 2nd release which would fix this LTE bug and also add wifi calling.
Is there some good way to flag this issue to LG without having to get hundreds or thousands of people to call Sprint customer service about it? Somehow I suspect the average user will notice poor LTE performance and just blame Sprint coverage rather than the ZVD update. Most will not be bothered to actually call about it either. I just wish manufacturers had an engineering mailbox or forum setup where the enthusiasts could actually flag these issues so they could be fixed in the next release. Customer service will probably just tell people to factory reset their phone.
Then again, maybe someone here has a LG connection they can get the word out
Strainc said:
tin foil will boost signal
Click to expand...
Click to collapse
Dumbass ?
rocket321 said:
If you have noticed after the ZVD update you seem to be on 3g a lot and seem to have problems staying on LTE in locations you previously had good signals, here is a fix I shared in the ZVD update thread which seems to completely resolved the issue:
1. Obtain your MSL
2. open the dialer and enter ##data#
3. Tap LTE and select edit
4. Enter your MSL
5. Select BSRTimer (defaults to 3000) and change the value to 3
6. Press back, phone should reboot
7. Profit
*does not require root
After doing this, I'm back to nearly constant LTE connectivity, where prior to the fix I was on 3g almost every time I checked.
Click to expand...
Click to collapse
Thanks for the information, I have located my MSL and entered DIAG, where do I locate LTE?
LS980 on ZVD
You mean data menu
Sent from my LG-LS980 using Tapatalk
secret.animal said:
You mean data menu
Sent from my LG-LS980 using Tapatalk
Click to expand...
Click to collapse
Yes I went to settings, the Mobile Data and I don't see where to do step 3. (3. Tap LTE and select edit)
Thanks for the response.
1bayne said:
Yes I went to settings, the Mobile Data and I don't see where to do step 3. (3. Tap LTE and select edit)
Thanks for the response.
Click to expand...
Click to collapse
From the phone app - dial pad
rocket321 said:
From the phone app - dial pad
Click to expand...
Click to collapse
Thanks for the reply, secret.animal has helped me out.
I'm still dropping to 3G at home when I was getting LTE (Spark) Sprint must be working on the towers. :crying:
Since I made the switch over to ZVD I have been picking up LTE everywhere. The only problem I am having is that I usually have to reboot my phone for out to switch over. Will this help with that? I am on LTE/CDMA...
jayt0625 said:
Since I made the switch over to ZVD I have been picking up LTE everywhere. The only problem I am having is that I usually have to reboot my phone for out to switch over. Will this help with that? I am on LTE/CDMA...
Click to expand...
Click to collapse
Yep, if you are rebooting or toggling airplane mode to get LTE, this should fix you up.

Radio problems.

So, i'm in the UK with my nice shiny OP3 (on Three UK) - I am rooted with twrp, but same applies on stock.
The radio in this phone seems to prefer H+/3G to 4G, even though where i live, i have full bars on both. My nexus 5 always prefered 4G, and the OP3 is set to prefer 4G but 90% of the time drops to 3G/H+
Another interesting thing, if i use the testing menu to force LTE only, even if it's on 4G already, completely stops any signal getting through for a number of minutes until it decides to connect sometime later. I have full LTE signal in my room too.
Is this a radio problem that could be solved in the future with a software update? not seen anyone else with this issue!
FYI, when it is on 4G, it's super fast and stays connected until a reboot, where the whole process starts again
Norman
manor7777 said:
So, i'm in the UK with my nice shiny OP3 (on Three UK) - I am rooted with twrp, but same applies on stock.
The radio in this phone seems to prefer H+/3G to 4G, even though where i live, i have full bars on both. My nexus 5 always prefered 4G, and the OP3 is set to prefer 4G but 90% of the time drops to 3G/H+
Another interesting thing, if i use the testing menu to force LTE only, even if it's on 4G already, completely stops any signal getting through for a number of minutes until it decides to connect sometime later. I have full LTE signal in my room too.
Is this a radio problem that could be solved in the future with a software update? not seen anyone else with this issue!
FYI, when it is on 4G, it's super fast and stays connected until a reboot, where the whole process starts again
Norman
Click to expand...
Click to collapse
Check your APN.
papi92 said:
Check your APN.
Click to expand...
Click to collapse
APN Is exactly the same as my nexus 5, and i even added a new one. Same deal.
I'm an IT Professional, just not a developer. i've done everything i can think of. 4G does work, but only when it wants to. My phone is also registered with my carrier correctly.
Bump on this anyone?
I am having a similar problem I guess. I have the dual sims installed and one sim randomly shows no range. Further, the network preference is not the way it is supposed to be - Chose it as 4G and if 4G is not detected it falls back to 2G.
Same issue forcing lte fixes lte for me but then no calls come through
Sent from my OnePlus 3
dkotoric said:
Same issue forcing lte fixes lte for me but then no calls come through
Sent from my OnePlus 3
Click to expand...
Click to collapse
Same as you. Anyone know how to fix the network priority to lock onto LTE first and then drop to 3G for calls?
Sent from my unknown using XDA-Developers mobile app
cdkg said:
Same as you. Anyone know how to fix the network priority to lock onto LTE first and then drop to 3G for calls?
Click to expand...
Click to collapse
I did notice when I do have LTE it's fine but it won't re lock onto LTE after a call on Three where it has to drop to H
I'm having a problem where the phone catches 4G+ "carrier aggregation" and it'll jump from to 4g+ to 4g and back to 4g+ really fast like almost flashing . And speed test are showing low numbers. T-Mobile USA.
Sent from my ONEPLUS A3000 using XDA-Developers mobile app
Same here. Sometimes it just locked to 3g/h+ in a strong LTE area for no reason. I'm on stock oos with one sim and 1 apn. Sometimes I need to reboot the phone to get LTE back.
Sent from my Pixel C using XDA-Developers mobile app
I first put my sim into slot 1 when I first got the device, I was having the exact same issue. I found that the data priority sim, or if you only have one sim needs to be in sim slot 2.
mrnovanova said:
Same here. Sometimes it just locked to 3g/h+ in a strong LTE area for no reason. I'm on stock oos with one sim and 1 apn. Sometimes I need to reboot the phone to get LTE back.
Click to expand...
Click to collapse
Yes exactly. And even then it doesn't show up straight away despite 3/4 and usually full signal. Sometimes just putting it into standby mode and leaving it 20mins can sort it... Until I get another call lol. Wondering if it's just a software or firmware issue that could be patched. Lte is fine it's just never preferred despite the options being set
papi92 said:
Check your APN.
Click to expand...
Click to collapse
APN is not the universal response. Here he faces a problem of inaccurate network type choice, APN is only to have acces to internet through the provider's proxies. It's a radio problem clearly, the baseband is probably to be corrected by OnePlus.
It's really a strange thing to see those network type issues, MMS issues are still present after all those years.
Striatum_bdr said:
APN is not the universal response. Here he faces a problem of inaccurate network type choice, APN is only to have acces to internet through the provider's proxies. It's a radio problem clearly, the baseband is probably to be corrected by OnePlus.
It's really a strange thing to see those network type issues, MMS issues are still present after all those years.
Click to expand...
Click to collapse
This is what I thought. It's probably an easy fix for oneplus or rom developers. Custom radios are nothing new. Let's hope so anyway!
This is happening to me as well. I'm on three in a strong 4G area but it always prefers 3G it's so annoying hope it gets fixed soon.
Sent from my ONEPLUS A3003 using Tapatalk
same problem here.
i tested op3 with 3 different carriers
on two of them - lte no problem, instant connect...
on third sim - slow connection, frequent out of range. almost no lte.
tested third sim on iphone - instant lte connect, no problem.
seems like a incompatibility with an selected cellular operators.
DrSun said:
same problem here.
i tested op3 with 3 different carriers
on two of them - lte no problem, instant connect...
on third sim - slow connection, frequent out of range. almost no lte.
tested third sim on iphone - instant lte connect, no problem.
seems like a incompatibility with an selected cellular operators.
Click to expand...
Click to collapse
Could be but I'm doubting it. OP3 Has full support at least for my carrier on both bands they use (3 & 20).. Never know, the devs here will figure it out if oneplus don't
So i am in Germany right now using Vodafone with LTE enabled and enough datavolume but i am surfing with 2g speed. What is this? Checked the apn and everything is fine. On my S5 i am flying through the net ...
---------- Post added at 03:00 PM ---------- Previous post was at 02:58 PM ----------
erdock said:
So i am in Germany right now using Vodafone with LTE enabled and enough datavolume but i am surfing with 2g speed. What is this? Checked the apn and everything is fine. On my S5 i am flying through the net ...
Click to expand...
Click to collapse
Even loading google is a struggle
Same issue here, have never got it to say 'LTE' for me since I got the phone, best it does is 4G whilst my Galaxy S5 would happily pickup LTE. Just wondering what UK users have there preferred network type set to? Mine is on GSM/WCDMA/LTE I assume that is right as that is what it went to itself and have tried LTE or LTE/WCDMA too.
RetroFlux said:
Same issue here, have never got it to say 'LTE' for me since I got the phone, best it does is 4G whilst my Galaxy S5 would happily pickup LTE. Just wondering what UK users have there preferred network type set to? Mine is on GSM/WCDMA/LTE I assume that is right as that is what it went to itself and have tried LTE or LTE/WCDMA too.
Click to expand...
Click to collapse
Sorry, i mean my OP3 shows LTE in statusbar but it runs with 2G speed

HTC One M9 - GSM Network Issue

Hello guys!
My HTC One M9 is giving me some headaches!
What is happening is that if I'm inside home, I cannot get GSM network. This happens for both voice and data.
As soon as I go outside, I get the 4G working like a charm. I could live with this, but sometimes I need to sleep inside home
From my troubleshooting around this, I found out that if I reset the phone, there is no change.
Reset network settings does nothing.
Sometimes if I restart the phone I get network, but it goes away quickly.
No change if I enable and disable the flight mode.
What does work is if I set the network mode to be 2G only, then I have the network and all works (except the data with some low speeds).
The phone is now with the build 4.28.401.3
I've tried different RUUs and it is the same thing.
Can someone help to try to understand what can be the cause for this?
.... could it be a network issue?
computerslayer said:
.... could it be a network issue?
Click to expand...
Click to collapse
Of the phone, yes.
I've tried the SIM card on another phone and it works really great! I've tried a different SIM card on this phone and it is the same thing. Loss of connectivity.
kulyboy said:
Of the phone, yes.
I've tried the SIM card on another phone and it works really great! I've tried a different SIM card on this phone and it is the same thing. Loss of connectivity.
Click to expand...
Click to collapse
Yes, I have noticed a similar issue and it has been very annoying. I know that in my area, I can get 4g+, but it only picks it up sometimes and goes away. Also, I have very strong 4g signal around my area but for some reason, it always uses 2g and sometimes gives my 4g, but rarely. I think it has something to do with the way sense automatically switches between networks.
Try typing in *#*#4636#*#*, press phone information and where it says some thing like lte/wcdma auto and select what you prefer. I chose lte/wcdma and now I only get 4g and 3g signals which is acceptable. If you want GSM or something, choose it as preferred. Play around with the different ones and see which is best for you.
If not, try a non sense rom, I don't know if that would help but give it a go.
Hope this helps,
Jev
Well, I've tried different settings, but it does the same. Only when using 2G or GSM only it works inside home.
I am yet to test with a non-sense ROM. Because for me, having an HTC is also because I like sense.
Either way, it seems to me that it can be hardware and not software.
Do someone knows what controls this network settings? A different board? A chip?
You mention applying the Nougat RUU for your phone - did you first update to Nougat via OTA?
The update was made via OTA. A regular update but this was already happening before the update.
kulyboy said:
The update was made via OTA. A regular update but this was already happening before the update.
Click to expand...
Click to collapse
:-/ Darn. Good on you for updating correctly, for sure, but that eliminates the problem I was anticipating.
Could be a carrier issue. If the other phone that has a good signal is an m9 then obviously your phone has a fault. If it was a different model and/or brand then you should learn something about "industry standards" as far as signal detection and interpretation goes. Just because one certain type/model/brand of phone has a good signal it doesn't mean another "has to".
Beamed in by telepathy.

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