Develop Bugs

[Q] Change 3G band to European GSM 900/1800

A family member gifted me a Galaxy S4, however it is the SGH-M919. I currently live in Europe and 3G bands in my region are GSM 900/1800. At the moment I can't access 3G and any other type of data for that matter (LTE is not supported here). Is there a way to change T-mobile 950 and 1900 bands to my region ones?
Thanks for taking your time to answer

Sadly not.
Since the radio does not support those frequencies for hsdpa

TheArtiszan said:
Sadly not.
Since the radio does not support those frequencies for hsdpa
Click to expand...
Click to collapse
So there's no way to fix it?

Hello Flex,
I have the same phone "Samsung S4 SGH-M919 - Tmobile" and I live in Hungary, it works fine with me all you have to do is just to switch form WCDMA/GSM to any other option "like GSM only" then back to WCDMA/GSM as a kind of refresh and the 3G will work fine after that, you can find this inside Settings > More Networks > Mobile Networks > Network mode, but unfortunately you have to do this every time you restart your device.
There is also another alternative solution is to reset the Access point names to default, you can find this inside Settings > More Networks > Mobile Networks > Access Point Names.
to be honest I don't know the reason of this error, but try what I described and tell me if it works with you.
Good Luck

Well. I have the exact same phone and have tried several ROMs, either custom or stock and basebands also. Nothing seems to work. The very few users who reported it was working didn't provide much evidence of it. Even Wikipedia says no 3G 900MHz availability for this phone. A simple edit to NV 1877 values won't solve it. I've tried that too.

[Q] LG G3 D855 LTE issue problem in UK

Hello
I have just got a LG G3 D855 from Asia. and the item can't find the LTE network. only work on WCDMA & GSM. any one have that problem and how can fix it
Lun

lunlun99 said:
Hello
I have just got a LG G3 D855 from Asia. and the item can't find the LTE network. only work on WCDMA & GSM. any one have that problem and how can fix it
Lun
Click to expand...
Click to collapse
You probably have the wrong band version i maybe wrong

jaythenut said:
You probably have the wrong band version i maybe wrong
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Click to collapse
the box mention phone supporting LTE 700/800/900/1800/2100/2300/2600. it isn't wrong band version.

lunlun99 said:
the box mention phone supporting LTE 700/800/900/1800/2100/2300/2600. it isn't wrong band version.
Click to expand...
Click to collapse
That's strange then maybe put this in the dialer 3845#*855# and see if it is activated

jaythenut said:
That's strange then maybe put this in the dialer 3845#*855# and see if it is activated
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Click to collapse
what's activated mean ?

jaythenut said:
That's strange then maybe put this in the dialer 3845#*855# and see if it is activated
Click to expand...
Click to collapse
what's activated mean ? and it's show up Connection problem or invalid MMI code

lunlun99 said:
what's activated mean ?
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If you have 4G it will say under band i think
And you do have 4G contract with your carrier

Yes. the SIM work my other phone in LTE network
jaythenut said:
If you have 4G it will say under band i think
And you do have 4G contract with your carrier
Click to expand...
Click to collapse

I'm having the same problem with Three UK, no 4G. Although 4G worked on my Lumia 1020 with the same SIM a few days ago.
If I go into the hidden menu under LTE you can set it to use LTE and it connects to 4G brefiely then goes back to 3G and it never shows GSM/ WCDMA / LTE auto in the mobile networks menu, just GSm / WCDMA auto.
I noticed on the demo unit in a Three store that the phones software version was V10a-EUR-XX whereas mine is V10g-HKG-XX.

lewisco said:
I'm having the same problem with Three UK, no 4G. Although 4G worked on my Lumia 1020 with the same SIM a few days ago.
If I go into the hidden menu under LTE you can set it to use LTE and it connects to 4G brefiely then goes back to 3G and it never shows GSM/ WCDMA / LTE auto in the mobile networks menu, just GSm / WCDMA auto.
I noticed on the demo unit in a Three store that the phones software version was V10a-EUR-XX whereas mine is V10g-HKG-XX.
Click to expand...
Click to collapse
if you have root you can try deleting (or renaming) LTE Config.apk from /system/app

Lennyuk said:
if you have root you can try deleting (or renaming) LTE Config.apk from /system/app
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Click to collapse
Is there anything that can be done without root? I've tried setting the LTE in the hidden services menu and it connects foe a few seconds and then goes back to HSDPA. If seeting to LTE only it stays on LTE but not sure how it will work if I leave 4G coverage? I've also enabled fast dormancy but that doesn't seem to help.

There was a discussion about this in the UK thread, some phones came with 4G deactivated (on the 800MHz band used by 3 and Vodafone) that had to be activated at every boot. Replacing it fixed the problem as its not supposed to happen. But since the phone is from Asia who knows. Im not sure if flashing the eur version of the rom would work?

lewisco said:
Is there anything that can be done without root? I've tried setting the LTE in the hidden services menu and it connects foe a few seconds and then goes back to HSDPA. If seeting to LTE only it stays on LTE but not sure how it will work if I leave 4G coverage? I've also enabled fast dormancy but that doesn't seem to help.
Click to expand...
Click to collapse
fast dormancy is a network dependant setting that has nothing to do with the generation of signal you are receiving.
The only other option you have is to try and flash another firmware version.

Lennyuk said:
fast dormancy is a network dependant setting that has nothing to do with the generation of signal you are receiving.
The only other option you have is to try and flash another firmware version.
Click to expand...
Click to collapse
Can you recommend which FW to use?

Same here d855 version 3gb ram from Hong Kong no lte in the settings

stinkypoo said:
Same here d855 version 3gb ram from Hong Kong no lte in the settings
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Click to collapse
LTE will work from the hidden menu, or download 4G switcher from the Play store which will take you to the menu also. Just change it to LTE/GSM/WCDMA and it will work on the 4G network (at least on 3 UK). LG UK support will not help as it came from HK. I still want to know if I can flash a Euro 32GB ROM to my phone to get it working natively.

make sure u have activate your LTE with your carrier,i you have done it,and still didnt have LTE, try the hidden menu,or try 4G switch frm playstore,rooting and deleting lteconfig from system/app would be your last option (i prefer this)

Lennyuk said:
if you have root you can try deleting (or renaming) LTE Config.apk from /system/app
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Click to collapse
thank you, this fixed my problem!
my lte/3g/2g settings was everytime reset to 2g/3g modus when i got back to settings. i deleted lte config.apk and the .odex file, rebooted and BAM! it keeps on lte/3g/2g

Solved
I had the same issue (no LTE option in Networks configuration menu), until today: My phone installed firmware V10i-HKG-XX, and now I have the "GSM/WCDMA/LTE auto" option in Preferred Network Mode.
Cheers

LG G3 Asian D855 no 4G
lunlun99 said:
Hello
I have just got a LG G3 D855 from Asia. and the item can't find the LTE network. only work on WCDMA & GSM. any one have that problem and how can fix it
Lun
Click to expand...
Click to collapse
Do the following -
1. From the dailer, type in 3845#*855#
2. Select LTE Only
3. Modem Setting
4. RAT Selection
5. GSM/WCDMA/LTE Auto
You should now receive 4G but everytime you reboot, you have to repeat this procedure

Disable 2G (LTE/UMTS only) solution

Sometimes the phone jump to 2G (EDGE) for no reason while HSPA and LTE work perfectly.
Here is the solution (and it will stay after power cycle):
Dial *#*#4636#*#*
Phone Information
Scroll down to network mode and choose "LTE/WCDMA"
Reboot the phone immediately.
This method works for me.

Almost, its *#*#4636#*#*

Trying to do this on my D855 international G3, on lollipop, but can't get into the phone information .
*#*#4636#*#* works, but when I click on Phone Information, an error is given 'note this application does not work on this device' . I suspect a changed lollipop radio/Rom thing.
Any idea on how to achieve this another way?

jimbobmcginty said:
Trying to do this on my D855 international G3, on lollipop, but can't get into the phone information .
*#*#4636#*#* works, but when I click on Phone Information, an error is given 'note this application does not work on this device' . I suspect a changed lollipop radio/Rom thing.
Any idea on how to achieve this another way?
Click to expand...
Click to collapse
Did you manage to fix it?

is there a solution for this on asop (euphoria 7/06)?.... after a call it goes to 2g and it "never" switches back to lte

New method:
Dial 277634#*# and you can get in Hidden Menu -> RAT Selection.

Typing 3856#*855# into the dialer allowed be in, then choose LTE, then RAT options.

Using the G3 D850 (AT&T) for t-mobile but it rarely conects to 4G LTE, it's usually on 2G, tried doing the above, with the *#*#4636#*#* code came up a error that I can't access that app, and in the hidden menu I couldnt find where/how to set WCDMA or LTE only, any new way to do this?

Qwerty when in hidden menu choose LTE-ONLY > then >modem setting> then > rat selection works on my g3

LG G4 H818N, can't get LTE working

Hi, I have a LG G4 H818N LTE model with dual sim running firmware v10c.
According to the mobile carrier, they support 900MHz and 2100MHz, yet I am unable to obtain 4G connection on my phone. I have enabled the option in the sim settings for "4G/3G/2G" on the SIM that I want to use for data and set that sim as the sim to use for data connection but it still only connects at H+.
Perhaps the carrier is using Cat 6 LTE. Is there a way to enable Cat 6 LTE on the H818N?
Is there a way that I can test LTE connectivity on the phone or are there perhaps any settings that I may have missed to force LTE connection?
I previously had an LG G3 D855 which connected to 4G without any issues.
Is there a file where I can manually edit the 4G bands for my phone?
Finally, slightly off topic. Can anyone explain to me what a KDZ file is?
Assistance would be highly appreciated. Thanks.

mine has a working LTE on both sim 1 and sim 2 but not simultaneously. i found out that the apn is alittle bit buggy. check your apn and set the primary.

Thanks, would you mind walking me through the steps that you followed please?

enter 277634#*# in dialer and go to field test > modem settings > lte band selection

sampathkumar2811 said:
enter 277634#*# in dialer and go to field test > modem settings > lte band selection
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Click to collapse
on three UK i could only get H+, but after using your instructions and choosing band 3, i now get lte, many thanks! Wiki has all the bands for countries/operators

reg66 said:
on three UK i could only get H+, but after using your instructions and choosing band 3, i now get lte, many thanks! Wiki has all the bands for countries/operators
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Your welcome

sampathkumar2811 said:
Your welcome
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Click to collapse
hmm, just went to my dads (no lte there) and came home again (lte here) and it would not turn back to lte, had to use the info you gave again. seems it's not sticking. any suggestions?

Hi all, thank you so much for the answer. I'm actually having the same problem with my LG G4 H818N. I'd be grateful if anyone can advise what kind of setting I should choose for my phone to work on Vodafone UK 4G network. I'm so frustrated to pay 4G plan but only get up to H+

Wannato said:
Hi all, thank you so much for the answer. I'm actually having the same problem with my LG G4 H818N. I'd be grateful if anyone can advise what kind of setting I should choose for my phone to work on Vodafone UK 4G network. I'm so frustrated to pay 4G plan but only get up to H+
Click to expand...
Click to collapse
Can't provide link as using xda app, but Google 'wiki Europe lte bands' and it should come up with what you want. I'm on three UK and there was two different bands to try, turned out to be band 3 for me. Hope this helps

reg66 said:
Can't provide link as using xda app, but Google 'wiki Europe lte bands' and it should come up with what you want. I'm on three UK and there was two different bands to try, turned out to be band 3 for me. Hope this helps
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Click to collapse
Sorry for my late reply! I did Google however, Vodafone is on Band 20. When I choose this option, it said Fail. Is anyone know why?

Wannato said:
Sorry for my late reply! I did Google however, Vodafone is on Band 20. When I choose this option, it said Fail. Is anyone know why?
Click to expand...
Click to collapse
switch 2nd sim to gsm n try again
---------- Post added at 01:10 AM ---------- Previous post was at 01:09 AM ----------
reg66 said:
hmm, just went to my dads (no lte there) and came home again (lte here) and it would not turn back to lte, had to use the info you gave again. seems it's not sticking. any suggestions?
Click to expand...
Click to collapse
im not sure of setting up it permanently.

sampathkumar2811 said:
switch 2nd sim to gsm n try again
Thanks. I just tried in the FieldTest -> Network Mode-> set SIM 2 to GSM 850 and try Band 20 again under the LTE Band Selection, but still Fail.
Are these steps correct?
Click to expand...
Click to collapse

Wannato said:
sampathkumar2811 said:
switch 2nd sim to gsm n try again
Thanks. I just tried in the FieldTest -> Network Mode-> set SIM 2 to GSM 850 and try Band 20 again under the LTE Band Selection, but still Fail.
Are these steps correct?
Click to expand...
Click to collapse
try changing the 2nd sim to gsm from settings other than hidden mode
Click to expand...
Click to collapse

sampathkumar2811 said:
Wannato said:
try changing the 2nd sim to gsm from settings other than hidden mode
Click to expand...
Click to collapse
However, I only have 1 SIM inserted at the moment. In order to change to Band 20, does it need to have 2 SIMs inserted and follow your instruction?
Click to expand...
Click to collapse

I'm having a similar issue with my 818N. I can't get 4G/LTE.
Has anyone worked out why or how to fix it?

The hidden menus don't allow me to select lte bands they all just say fail after I select them.
In the RAT menu I am unable to select LTE only, it also fails.
It's as if LTE is disabled?

I tried installing 818P software into the phone which worked fine however I still couldn't connect to 4G.
I give up

It turns out that my phone was faulty and I've returned it to HK for a full refund. DWI were good to deal with and were fast to refund me my money once they confirmed that it was DOA.

Flash European software?

Hey guys, apologies if this has been asked before or if this is a silly question.
I recently bought an Asian Lg G3 d855. The software version is D85510e-GLOBAL-COM.
The phone is working fine apart from not having any 4g connectivity. I have went into settings and tried to change to GSM/WCDMA/LTE auto but it doesn't connect to 4g and switches back to GSM/WCDMA auto as soon as I exit the screen.
I have also went into the hidden menu, to LTE ONLY, RAT selection and tried to change it there but still no 4g. If I choose "LTE only" I lose my signal completely.
I have also went into band selection and chosen band 20, as this is the LTE band for my network in the UK (O2). It says success when I click on it but still no 4g.
My question is, is it possible to flash a European software version and would this enable the 4g?
Or is there any other way to enable 4g on this phone?
Thanks in advance!