Can't get LTE + Network to work - G3 Q&A, Help & Troubleshooting

Hey guys! I recently bought a G3. It's a Korean Variant LG-F400L from U+. My problem with this phone is that when set to "Global" mode (GSM/WCDMA/LTE) it connects to LTE but says "Not in Service Area" whenever I try to make a call so I don't get the normal call and text services but when I set my network mode to (WCDMA Only) I get the call and text service but no LTE only 3G. So maybe Global mode prioritizes GSM? I don't know.
If I do LTE only mode, I can receive texts I believe but I can't make phone calls. I know it is not a problem with my network, as I have a Galaxy Note 3 and LTE + Calls work fine on my Note 3. Yet this G3 will only do one or the other. There is no option from WCDMA + LTE only.
IF anyone has any ideas, I would love to hear it. I'm also wondering if changing the rom would help this issue.
I should also mention that I am on another provider (SK Telecom) while my phone is a unlocked U+ phone!

Metsuna said:
Hey guys! I recently bought a G3. It's a Korean Variant LG-F400L from U+. My problem with this phone is that when set to "Global" mode (GSM/WCDMA/LTE) it connects to LTE but says "Not in Service Area" whenever I try to make a call so I don't get the normal call and text services but when I set my network mode to (WCDMA Only) I get the call and text service but no LTE only 3G. So maybe Global mode prioritizes GSM? I don't know.
If I do LTE only mode, I can receive texts I believe but I can't make phone calls. I know it is not a problem with my network, as I have a Galaxy Note 3 and LTE + Calls work fine on my Note 3. Yet this G3 will only do one or the other. There is no option from WCDMA + LTE only.
IF anyone has any ideas, I would love to hear it. I'm also wondering if changing the rom would help this issue.
I should also mention that I am on another provider (SK Telecom) while my phone is a unlocked U+ phone!
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Click to collapse
Hi! I guess you're in Korea? Have you tried another sim card? Is this a new phone or did you purchase it second hand?
EDIT : It sounds like a network problem.. The phone hasn't been registered correctly.

Did you make sure you have the right APN settings?

So I actually changed my mobile provider to u+ because I was off contract and my phone was able to get VoLte and LTE. So maybe the issue was the phone defaulting to VoLte? I have no idea how to turn it off on this F400L model. I've tried most of the methods I think. Any ideas how to turn it off? Either way I guess it's a little bit solved now that I can call again.

I am having the same problem
Hello Metsuna
Can you tell me how you solved the problem, I am having the same problem and cant connect to internet. Can;t make or receive any calls.
Thanks

Related

[Q] LTE service issue on Galaxy S4 model i545 [PLEASE MOVE]

EDIT: Sorry for posting in the wrong section, can a mod please move this thread?
Hi all,
I have a question regarding my Verizon Galaxy S4 i545 model. I purchased the phone unlocked out of the States, and now have it in Canada partially working on my carrier, SaskTel. The phone seems to work fairly well, except I'm having some issues with LTE/4G service.
Basically, if I set my network mode to "LTE/CDMA" I get a perfect LTE connection, fast speeds and it works well. However, when LTE is enabled, I'm unable to send/receive any type of text message, and I'm unable to make phone calls as well. The phone itself displays that I have no service, but I can still use LTE. I phoned up my carrier to see if they could help me figure the issue out, and they said it could be because Verizon tends to complete all phone calls, and send all texts over LTE. The support rep explained that with SaskTel, phones usually drop down to 3G connectivity for a few moments when sending texts, or making a phone call, because SaskTel does phone calls and texts over 3G.
However, if I set my network mode to "GSM/UMTS" I receive a data connection through HPSA+, and can text and phone people as well. Obviously this isn't an ideal situation, because HPSA+ speeds are quite slow. (1-3Mbps download) I have found a sort of fix to this issue. To temporarily fix it, here's what I do:
-Set network mode to "GSM/UMTS"
-Clear the "Messaging" app cache
-Restart the phone
-Set network mode to "LTE/CDMA"
Then the phone can use LTE and still text and make phone calls. However if it ever loses connection, or if I enable airplane mode, once the phone regains connectivity, I have no service, but can still use LTE data.
Do you guys have any ideas of what might be causing this? I thought it might be a modem issue, but I figured most people here would know more than me on this topic. (this is my first Android device, and I've had it for about four days now)
Here are some things I've tried doing to fix the issue:
-Pop out SIM card and pop it back in
-Test different APN settings for my carrier given to me by my carrier
-Test the phone with a different SIM card from the same carrier
-Reset phone to factory defaults
None of these made any difference at all to the issue, and it seems that my "temporary fix" seems to be the only way to fix this issue. Any advice on this issue would be appreciated!

International LG G4 does not connect to LTE after drop to 3G

I have an international LG G4 H815 on T-Mobile and the LTE works perfectly, but after it drops to 3G to connect to an incoming phone call, it won't want to connect back to 4G LTE even if I manually select LTE in the select networks menu.
Only a restart or selecting "LTE only" in the engineering screen clears the issue(but with LTE only I can't make or receive phone calls or send or receive text messages) but it is very annoying and I was wonder if anyone else had this problem.
I have the exact same issue if anyone have the solution id love to hear

Can't place or receive calls; LTE data and SMS works fine

Hey guys, just unwrapped my new N5x and popped in my sim card. Yet for some reason I can't make or receive any calls!
Calls to me go straight to voicemail, and when making an outgoing call it either immediately says call ended or after a while says network unavailable.
The strange thing is that the entire time I'm connected to LTE (full bars) and data works fine (I can use chrome), and I can even send and receive SMS!
It's been like this straight out of the box. I reset the network settings, then factory reset the device, then upgraded to 6.0.1, rinsed and repeated with no luck.
Probably related: I tried setting the phone from LTE preferred to 3G or 2G but it still says connected to LTE. Even did it manually from the *#*#4636#*#* and nothing changed.
I'm using HOT Mobile in Israel and the American version of the phone. All bands are here are supported.
Any thoughts on how to proceed?
Do US specifc models of phones normally work fine in Israel?
I know I had these symptoms when I managed to accidentally swap my UK model to use USA bands. Only potential difference is that I don't think SMS worked for me.
If someone more knowledgeable knows where the "Network settings reset" pulls values from and to, that might help.
Or which partition holds the data that makes a US phone a US version and an EU phone an EU version (assuming it isn't hardware), we could potentially flash stuff.
Yeah they do. I have a friend with a 5x and his phone is working fine. :/
Check your apn settings, re add them again to test.
Maybe your network do not support lte calls, try it on 3g. This was my solution even thought my network supported volte and worked on s6 but not on my 5x.
I see you tried the 3g option, my problem was another app causing the conflict between lte and 3g. Able to source for another spare sim to try?
I deleted the apn settings - no luck. tried 2 different service providers and same results with both
I havnt installed anything yet and wiped the phone to be sure. Could a stock app be causing the conflict? How can I check?
did you try having your friend put his sim in your phone and yours in his to see if it works?
Yep - he's on the same service provider that I am. Didn't work. Also tried a Sim card from a different service provider.
Here is a solution if you still need it http://forum.xda-developers.com/showpost.php?p=64023143&postcount=10

Strange bug: Data (LTE) is fine but no call or sms

I am using a HTC 10 phone au kddi Japan variant. Got success in converting the phone to international but have been rocking custom ROM for a while already now. Bootloader unlocked, S-OFF (obviously). Been running the custom ROM Viper ROM ok for a while but when I converted to the WWE this strange bug happened. I got data, LTE, good connection but no call or sms and it said No service despite the carrier showing up in the menu. Huge thanks if anyone can help me
I got this OP3 that made me change it to the HTC 10. The Problem of it may give you an explanation.
It couldnt Lock signal on LTE and was returning to Edge So you had to press *#*#4636#*#* and select the Network type to LTE only.
However although the phone locked LTE for good then it couldnt make any phone calls or txt msg.
I had to choose LTE/CDMA or LTE/GSM
In Order to change while in call to Edge or "H+" Network.
I guess by that we understand that LTE is only for DATA and not for Voice calls and txts...?
Hope i helped...
kanth1991 said:
I got this OP3 that made me change it to the HTC 10. The Problem of it may give you an explanation.
It couldnt Lock signal on LTE and was returning to Edge So you had to press *#*#4636#*#* and select the Network type to LTE only.
However although the phone locked LTE for good then it couldnt make any phone calls or txt msg.
I had to choose LTE/CDMA or LTE/GSM
In Order to change while in call to Edge or "H+" Network.
I guess by that we understand that LTE is only for DATA and not for Voice calls and txts...?
Hope i helped...
Click to expand...
Click to collapse
Yeah, I tried your method but it didn't work. Don't really understand why that happen tho because if I have the right radio to have LTE then why can't I do call?

Question Problem to use Motorola Edge X30 in USA

Hello, first of all I want to say that my native language is Spanish and I am using the Google translator to write this, so there may be writing errors and apologize.
Buy a motorola edge x30 and the imported import from China. The phone is unlocked to be used with GSM networks from anywhere in the world. When I bought it, I was with Metro PCS but in Metro I was told that the phone was not compatible with the 3G networks of them. After that I started to investigate and find a web page called kimovil and there I saw that the edge x30 was compatible in the USA with all the networks of 3 suppliers: Cricket, AT & T and T-Mobile: I choose to use change to metro by T-Mobile.
Immediately I left the T-Mobile store after making the change I have tried and could receive and send SMS, receive and make calls, and get access to the Internet without any problem. After a couple of hours of having activated services with T-Mobile, the phone could not or receive more calls (the Internet and SMS continue to work normally, the problem is only with calls). When I try to call someone, the call is not done and says "Hanging Up". I tried everything: Factory Reset, Networks Reset, modify network configuration, everything ... and I can not solve the problem. I went to T-Mobile to tell you about my problem and they tell me that the problem is not them but my phone.
If anyone knows how to solve this problem, I would greatly appreciate the help because I feel frustrated. Thanks
I have MOTO EDGE x30 with T-Mobile. Work perfectly. Check the SIM setting.
[email protected] said:
I have MOTO EDGE x30 with T-Mobile. Work perfectly. Check the SIM setting.
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Click to collapse
Good afternoon. I already managed to use the Edge X30 with the T-Mobile network. You just had to put the network selector on automatic so that you can use 5G, LTE, 3G and 2G as you see fit. The problem is that I realized that the phone only calls and receives calls in 3G and 2G, which limits not only the quality of the calls but also limits your coverage to be able to make calls since you can only make them in 3G and 2G . You who also use T-Mobile, does the same thing happen to you?
I'm not sure, but it supports 5G in N1/N3/N5/N7/N8/N20/N28/N38/N41/N78 and 4G in B1/B2/B3/B4/B5/B7/B8/B12/B17/B34/B38/B39/B40/B41. or check volte settings.
you may try to install "carrier services" app by google from the play store. it solves some of my problem with data connection.
jorgerios15 said:
Good afternoon. I already managed to use the Edge X30 with the T-Mobile network. You just had to put the network selector on automatic so that you can use 5G, LTE, 3G and 2G as you see fit. The problem is that I realized that the phone only calls and receives calls in 3G and 2G, which limits not only the quality of the calls but also limits your coverage to be able to make calls since you can only make them in 3G and 2G . You who also use T-Mobile, does the same thing happen to you?
Click to expand...
Click to collapse
Yes I have the same issue. Whenever I make or receive voice calls, the phone falls back from LTE to 2G. I looked everywhere on the phone for 'VOLTE' settings but could not find it. Does VOLTE work for this phone on Tmobile? Very frustrating.
Has anyone been able to find the solution for the calls switching back to 2g? I love the phone but this is extremely annoying. I'm on T-mobile. Thank you

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