LG G2 AT&T D800 Stopped working with 4G LTE - AT&T LG G2

Hello,
My LG G2 D800 AT&T suddenly stopped working with 4G LTE, I am from Venezuela with a service plan with Movistar and I already had my sim card ready to work with 4G also had a data service for LTE, in fact I was working with 4G for aproximately 3 months under Band 4(1700/2100) but one day without installing any additional software the phone stopped working with 4G.
I placed the sim card into a different phone and the 4G worked on that phone.
I have tried factory restore without any third part application, also included the company APN and it is still in 3G not in 4G.
I entered into the hidden menu and selected the BAND4, my android version is 4.4.2 but it doesn´t allow to select 2G/3G/4G or select any prefered network you can just search for available networks and if I do I just find WCDMA and GSM not LTE. The other option available beside Search for available networks is Automatic Selection which usually selects the LTE network but now just select WCDMA.
I also tried entering *#*#4636#*#* and try to select any prefered band but that option is not even listed, I think is the stock rom.
I don´t know what to do now, I have tried everything but I don´t know if I have to install a custom rom in order to get the option to select the prefered network. I would like to keep my stock rom because I use quick remote and some other application I know I won´t find in a custom rom.
I hope somebody can help me because the LTE data service are really expensive and I am not using right now.
Please I need your help!!

Related

[Q] how to select network operator manually?

i am using AT&T's Samsung galaxy s2 skyrocket (unlocked), i am unable to select a network operator manually. As i keep going around different countries, i keep on purchasing local sim cards for calling home, so i need to select the network manually, otherwise it will select the network which has best signal strength and i may land up paying heavy charges for roaming.
when i go to wireless and network/ mobile networks/ network operators only thing which comes written is "DEFAULT SETUP" and that is greyed out. (when i tap on nothing happens).
also when i change back to my old AT&T sim, i am able to access that greyed out area, but when i put another sim "DEFAULT SETUP" is again inaccessible.
can someone please guide me through it..??
Are you using the stock ROM?
Sent from my SGH-T989 using Tapatalk
I have bought the phone just a weak ago... i have changed nothing except for SIM card....
actually i dont know any thing about ROMs and i m new to android also... i just guess that above written satisfies your question.
well thats your answer. You can not do that on stock att firmware
what modifications i have to do .... to achieve the desired results...??
and please tell HOW to do also....!!
You need to flush custom ROM that supports changing network operator settings.
Look at this post if you would like to use custom ROM:
http://forum.xda-developers.com/showthread.php?t=1383464

[Q] Need Help regarding Network Mode Issues on LG G3 AT&T

Dear All,
I am having issue of Network selection on my LG G3 D850.
1st of All sorry for my English.
Intro of Phone
Phone is rooted and Lollipop stock rom installed.
My Network is Zong (Pakistan) Frequencies are following
3G = 2100
4G = 1800
Issues
At start Network mode setting was not available under mobile network but now after changing ro.build.target_operator ATT to OPEN i got these setting in Network menu but now.
1. 3G not working in this cell phone my network frequency is 2100 and this cell phone also support this but why this is not working,
I have tried to check and change WCDMA mode it is showing 850 as selected but when i try to select the 2100 message show Fail.
2. Not switch automatically to LTE/4G (but some time after restart), when i select LTE/4G by selecting Manually LTE/4G network from manual searched Network list or after restart, Cell Phone unable to receive any phone call, caller receive message like cell phone switched or unable to reach or out of coverage etc,
3. when i dial *#*#4636#*#* after opening the Menu and selecting the Phone Information this application show message "this application dose not work on this device" and it close this menu.
No issue on 2G.
I also have tried Intelli3G but it was not working on KK or i dont know how to use it now i have LP I am not able to install Xposed i have installed the different version but not working i also flash a zip file which was working on Xperia Z1 but my Cell phone Rom got issues (All time message show LGSmartwatch (or something like that) stop working), so i again install LP on device.
I am New user of LG G3. please guide me
@wajeeh.ihi dial 3845#*855# on ur phone then select lte only then select modem settings then RAT SELECTION Then choose the 1st option which has lte auto in the end. Ull have to do this everytime u restart your phone to use 4g lte.
Hello wajeeh. need your help in editing that buildprop file. I managed to do it on stock lollipop rom but now i forgot.. Can you please help me out .
Thank you

LG G3 850d 2G,3G,4G

Hi, I recently bought a LG g3 smarthphone and I found out that it's an AT&T version phone, but thankfully it's unlocked. My problem is, that it doesn't get any mobile network. In the setting it says that the Mobile network type this device can use is HSPA, my local carriers can only provide LTE, GSM and WCDMA rat types, I don't know if it's the case. I've tried to solve this on my own, but without luck. The solutions with 3845#*850# or similar codes just woun't work, when I choose any RAT it says: "succsess", but it doesn't change a thing and when I choose "LTE only mode", the phone blocks my mobile connection and says: "Restricted access changed: Data service is blocked" .
I really need any help, because I cannot see myself using a mobile phone without mobile internet. I tried to use 2G, 3G and 4G networks, but none work, nothing appears. Also I tried to fix this problem by flashing a Cloudy ROM wich is lollipop 5.0 and it didn't solve my internet problem. BTW, my location is Estonia.
I really need your help guys, I'm desperate as hell, this is my last option, because I didn't find any other solutions on my own.
Counting on you :3
romax11 said:
Hi, I recently bought a LG g3 smarthphone and I found out that it's an AT&T version phone, but thankfully it's unlocked. My problem is, that it doesn't get any mobile network. In the setting it says that the Mobile network type this device can use is HSPA, my local carriers can only provide LTE, GSM and WCDMA rat types, I don't know if it's the case. I've tried to solve this on my own, but without luck. The solutions with 3845#*850# or similar codes just woun't work, when I choose any RAT it says: "succsess", but it doesn't change a thing and when I choose "LTE only mode", the phone blocks my mobile connection and says: "Restricted access changed: Data service is blocked" .
I really need any help, because I cannot see myself using a mobile phone without mobile internet. I tried to use 2G, 3G and 4G networks, but none work, nothing appears. Also I tried to fix this problem by flashing a Cloudy ROM wich is lollipop 5.0 and it didn't solve my internet problem. BTW, my location is Estonia.
I really need your help guys, I'm desperate as hell, this is my last option, because I didn't find any other solutions on my own.
Counting on you :3
Click to expand...
Click to collapse
I think your a little confused about your network. HSPA IS WCDMA/GSM. You want to just slept gsm/WCDMA/LTE
Sent from my iPhone using Tapatalk
Flashing a ROM is not the solution. AT&T version of the LG G3 covers a limited radio frequency spectrum. It could be that the phone does not cover the frequency of your carrier. Another issue may be with the carrier themselves blocking the IMEI (I know some carriers require registering the IMEI on their network). Of course you must also make sure the carrier has data services available to you.
I kinda have the same problem....
No service.
I've tried everything to no avail.
Help gor a fix.

HELP, Stick only to 2G network...

Hi,
I just purchased a new, unlocked, Lg G2 D800 as a replacement for my G2 D802 international version. I updated it to 5.0.2.
The problem is that here in Italy that I am trying to use it, it only works on 2G network... My carrier told me that that everything is ok with my line, and I should be running on 3G or 4G...
Under settings- mobile networks there is NOT an option to choose data speed (like 2G, 3G, or 4G...). Applictions through play store like intelly3G, 4GLTE Switch, Switch network type 2G/3G, etc, return me the message that are not supported from my phone...
Even when I try to pybass that through the hidden menu, dialing the USSD code: *#*#4636#*#* I get the same message, "the application does not work on this device"...
I am desperate... Please any ideas
Thank you!

Lg g4 h810 works 2G only

Hi,
I bought this phone Lg G4 h810, it shows AT&T logo whenever i boot it and the problem is despite of network mode on lte/wcdma/gsm/auto it always runs on2G internet speed and shows E sign.
I am from india and many service providers are still not offering4G internet service. But this phone doesn't even runs on wcdma. My previous phone lenovo was nicely running on wcdma and always showed the sign H.
My cellular operator is idea cellular and i had a word with them, they sent me settings and all and help me input the settings manually too, but nothing worked.
I checked even the frequencies, idea cellular is offering UMTS B1(2100) and UMTS B8(900 gsm). I checked this on LG website and these bands are compatible with the phone i bought, but still i can't get anything more than2G. Why so?
Plus there is one more problem, when i switched it on for the first time it showed update available And when i tried to update, it showed error and now always there's an icon on top left corner of phone saying couldn't install system update. I tried restarting and updating the device many times, but it's still the same.
Any help is much appreciated.
Thanks in advance.
Have you put your Company APN?
Yes i did, the company executive even helped me to manually save the settings to run the internet in a 3G mode. But all efforts in vain.
Did you solve the issue?
Anything new? I have the same problem.
I have this problem too
Try hidden menu with *#546368#*810# and under Field Test menu / Modem settings if there is VoLTE on/off chose VoLTE and restart. I have done that and my phone starts working with 4G. Don't forget to set up good APN if it's not automatically set by network provider.
scytalemk said:
Try hidden menu with *#546368#*810# and under Field Test menu / Modem settings if there is VoLTE on/off chose VoLTE and restart. I have done that and my phone starts working with 4G. Don't forget to set up good APN if it's not automatically set by network provider.
Click to expand...
Click to collapse
Hi
Under VoLTE there is another entry named "Session" and in there
RPR(on/off) switch
I enabled it and restarts but it is again on 2g
Anyone further on this issue??
I have this problem too
I was flash the stock firmware,custom firmware customizing the build.prop,changed the settings in the engineering menu *#546368#*810# disconnected volte,changed LTE bands forcibly. Nothing helps,dont work 3G LTE - 2G only(. I realized that I need to re-flash (change) the original QCN file for H810 and re-register IMEI , but I can not find QCN it freely available.
Hello there, i had the same issue. The fix that worked for me was searching for network manuallly and reconnecting again to my carriers LTE network. Worked as a charm. The issue maybe was a brutal handover as I had been travelli g from a city to another one 200 km away. So somehow I had been disconnected from the LTE network and left stranded in the 2g one. Try it it should work

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