[Q] Network Reverting to GSM/WCDMA Only - G3 Q&A, Help & Troubleshooting

Hi,
I bought a 2nd hand G3 from a store recently and have noticed that under network settings even if I select GSM/WCDMA/LTE as soon as I leave the menu it reverts to GSM/WCDMA only. It sometimes finds and attaches to the 4G network but prefers the HSPA network and connects to that as a priority even if 4G is in the area.
I've done a rom flash with clear option and done a factory reset but that option continues to stay set to GSM/WCDMA so wondered if somebody had changed something in the hidden menus and that I might need to change it back and what setting might need changing?
I've tried 2 official rom flashes just to make sure it wasn't a bug, they are the 10G and the 10J roms, the 10J being whats installed now.
Any ideas anyone??

Go to dial press 3845#*your phones model and then press # like 3845#*855# then go to lte only and then go to modem settings and then rat selection and then choice what you want

Tried that makes no difference. As soon as you leave the menu it still reverts back

Delete lteconfig with TB

Whats TB?

Jinxy said:
Whats TB?
Click to expand...
Click to collapse
Titanium Backup

I'm not rooted so titanium backup won't work

I have the exact same problem, after you choose GSM/WCDMA/LTE and exit the menu it goes back to GSM/WCDMA im on D855 with 10i not rooted.

Ok so it might be a software thing with the later builds? I'm on 10j at the moment and have done factory reset full reflash the lot, so thought it might be something that had previously been done in the hidden menu.
Sent from my iPad using Tapatalk

Jinxy said:
Ok so it might be a software thing with the later builds? I'm on 10j at the moment and have done factory reset full reflash the lot, so thought it might be something that had previously been done in the hidden menu.
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
I was using 10a-eur before and everything was fine im using 10i-global wich i updated with lgflashtool, so im guessing either that is the problem (eur to global) or its with the update itself.

I'd guess then it's in the update 10i/j
Sent from my iPad using Tapatalk

Jinxy said:
I'd guess then it's in the update 10i/j
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
If you do not want to root you could consider to flash it back to the v10 version that did not gave you any problems with it! But the most easy way is to root it using purpledrake and then install titanium backup and delete the lteconfig!
http://forum.xda-developers.com/lg-g3/development/root-root-lg-g3-easily-purpledrake-lite-t2821000

vak20 said:
If you do not want to root you could consider to flash it back to the v10 version that did not gave you any problems with it! But the most easy way is to root it using purpledrake and then install titanium backup and delete the lteconfig!
http://forum.xda-developers.com/lg-g3/development/root-root-lg-g3-easily-purpledrake-lite-t2821000
Click to expand...
Click to collapse
So i rooted my phone and did all that it seems to be working now but if i want to remove root i have to reinstall the kdz wich means it will go back to not working again right?
edit: just tested myself root gone and it goes back to not staying on LTE damm bug -.-

I rooted, removed the lte file and flashed it and had the same problem, so I downloaded the 10h kdz again and it fixed it, so the 10g and 10j files I had must contain the duff lte file
Sent from my iPad using Tapatalk

Jinxy said:
I rooted, removed the lte file and flashed it and had the same problem, so I downloaded the 10h kdz again and it fixed it, so the 10g and 10j files I had must contain the duff lte file
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
I have the 10i version, guess im downloading the H to give it a go.

Jinxy said:
I rooted, removed the lte file and flashed it and had the same problem, so I downloaded the 10h kdz again and it fixed it, so the 10g and 10j files I had must contain the duff lte file
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
I agree with you! I flashed few days ago the10j files and I noticed that 2G/3G/4G was missing. Today I decided to reflash the D85510H_00. This .kdz files are suitable for my IMEI. I downladed from http://lg-firmware-rom.com/. Now 2G/3G/4G is active. I think that will help!

For those who aren't rooted, try NOT going into the "Mobile Networks" menu to switch to "GSM/WCDMA/LTE".
Try this instead.
-Go into dialer and dial in 3845#*855#
-Select "LTE-Only" and go into "Modem Settings"
-select "RAT Selection" and select "GSM / WCDMA /LTE auto"
See if this helps you retain LTE. If it does, do NOT go into "Mobile Networks" or switch to "2G only" because I have that it disables my LTE when I do that.

O29C said:
For those who aren't rooted, try NOT going into the "Mobile Networks" menu to switch to "GSM/WCDMA/LTE".
Try this instead.
-Go into dialer and dial in 3845#*855#
-Select "LTE-Only" and go into "Modem Settings"
-select "RAT Selection" and select "GSM / WCDMA /LTE auto"
See if this helps you retain LTE. If it does, do NOT go into "Mobile Networks" or switch to "2G only" because I have that it disables my LTE when I do that.
Click to expand...
Click to collapse
I tried that, it goes into 4g sometimes but it preferes 3g/2g conections for some reason, switched to 10h eur and it shows on the network menu lte enabled and it works fine.

Related

LTE/CDMA 3G/4G Setting Stuck on WCDMA Preffered

Using the dialer code *#*#4636#*#* I have changed the setting from "LTE/GSM/WCDMA" to "WCDMA Preffered". I did this to see the difference in battery life being connected to HSPA+ & 3G compared to LTE which I was connected to before.
The Problem is the setting is stuck on "WCDMA Preffered". No matter what I do, when I select something with LTE in it if I exit the test menu and go back in with the dialer code it is back on "WCDMA Preffered".
Things I have tried:
1. Re-Flash ROM
2. Flash a different ROM
3. Re-Flash the Modem I747MVLLE8
4. About every possible combination of turning on/off the radio and disabling data connection and rebooting
I'm on Rogers running Ultimatum ROM and Faux's Kernel.
I'm hoping somebody knows of a way to get this setting back even if it involves flashing something with Odin or reformatting my phone or going back to 100% stock. Any help is greatly appreciated, thanks.
Sent from my SAMSUNG-SGH-I747
Drats
Sent from my phone through the dark abyss known as "The Internet"
In case anyone encounters this I solved the problem by flashing cm10, which has a working toggle in the menu. Im sure using odin to flash the stock firmware would also work.
Sent from my phone through the dark abyss known as "The Internet"
dunkaskunk said:
In case anyone encounters this I solved the problem by flashing cm10, which has a working toggle in the menu. Im sure using odin to flash the stock firmware would also work.
Sent from my phone through the dark abyss known as "The Internet"
Click to expand...
Click to collapse
I'm in the same boat. For some odd reason my ATT S3 is unable to get LTE in any roms except LoserRom and Stock 4.0.1. Even when I update to stock 4.1.1 with Samsung Kies I an unable to get LTE. I've tried CM10 any many other roms, but can't get LTE on them. Also checked the network and mine is stuck on WCDMA Preferred. Unable to change. I would select LTE and it would change it right back even on CM10. Any ideas?
Did you try changing it using the menu in settings when on cm10 or stock JB? Instead of the dialer code.
I used the settings menu in cm10 to change it and the change stuck. Then I used Odin to flash the stock 4.1.1 firmware that I got from samfirmware and it stayed on LTE through that transition. There is also a setting for network mode in the menu's in 4.1.1
Other than that I'm out of ideas.
Sent from my phone through the dark abyss known as "The Internet"
dunkaskunk said:
Did you try changing it using the menu in settings when on cm10 or stock JB? Instead of the dialer code.
I used the settings menu in cm10 to change it and the change stuck. Then I used Odin to flash the stock 4.1.1 firmware that I got from samfirmware and it stayed on LTE through that transition. There is also a setting for network mode in the menu's in 4.1.1
Other than that I'm out of ideas.
Sent from my phone through the dark abyss known as "The Internet"
Click to expand...
Click to collapse
Yes i did try it on cm10 menu. I go ti the network selection and see it on wcdma preferred. Click it and select the lte. Right when i hit back it changes right back to wcdma preferred. In the stock 4.1.1 its not changeable. It says the default is selected. The only way i can see the options are if i pop the sim up but not out. The phone will say sim removed. When i go to the setting then the options are available.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
Like to know how too as well am on jb 4.1.1 stock & rooted.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Just happened to me.. changed it to WCDMA via *#*#4636#*#* and it is stuck there now.. any solutions??
I'm in a similar situation.
I flashed with SynergyROM and the Modem for Rogers and have lost LTE connectivity and the setting is stuck on WCDMA.
It's like punishment for being awesome.
Go to APN settings make up an APN.....then switch to it.....then quickly hit the dialer code *#*#4636#*#* and when you see the radio disconnect ("unknown" network)....switch the toggle.......tada!
Galaxy S III I747
fmllc said:
Go to APN settings make up an APN.....then switch to it.....then quickly hit the dialer code *#*#4636#*#* and when you see the radio disconnect ("unknown" network)....switch the toggle.......tada!
Galaxy S III I747
Click to expand...
Click to collapse
I'm not sure what I'm missing, but I couldn't get this to work. Which toggle are you referring to?
SERVICE MENU
****************
*#197328640#
Code to disable lte - 1187226
Code to re-enable - 118721
ashokjp said:
SERVICE MENU
****************
*#197328640#
Code to disable lte - 1187226
Code to re-enable - 118721
Click to expand...
Click to collapse
Sent from my SAMSUNG-SGH-I747
Says it is restricred on mine
LifTeD_JK said:
I'm not sure what I'm missing, but I couldn't get this to work. Which toggle are you referring to?
Click to expand...
Click to collapse
There should be a pull down window after you go into device info. that should read lte/cmda/gsm if stock....it will read something else if its "stuck" on something else...
Galaxy S III I747
Go to [Settings -> More... -> Mobile Networks -> Network operators]
Click on ATT to reregister the network then switch it from lte to gsm/wcdma on Network Mode and it should work but after reboot you have to do it all over again.
Heavy Metal said:
Sent from my SAMSUNG-SGH-I747
Says it is restricred on mine
Click to expand...
Click to collapse
ashokjp missed a step.
SERVICE MENU
****************
*#197328640#
Code to remove Restriction: 11865
then
SERVICE MENU
****************
*#197328640#
Code to disable lte - 1187226
Code to re-enable - 118721

Change from lte to h+ on aosp

How can I use only H+ on am soap ROM wit high flashing to a different tom then restoring to a backup...my phone hasn't been making backups correctly and I Dont want to try to restore a backup again till I want to flash another rom
The 3g APN that came with the ROM doesn't work..only the late one
Anyone? I'm desperate for a fix
I think is in Settings/more settings/mobile networks/network mode/ and choose your network. Those listed are LTE/GSM/WCDMA (Auto Mode), GSM only and WCDMA only. Hope this helps.
Doesn't work..it changes back immediately
trh1341 said:
Doesn't work..it changes back immediately
Click to expand...
Click to collapse
I am making the assumption you are on AT&T version of the SGS3 based off the fact that your profile shows you with AT&T. If this is the case before you select from network modes, you need to select "network operator". This will take several minutes to find them all and give you a selection. Once it finally populates, you can choose your carrier. I get 3 AT&T options on my phone so I just choose the first one. Selecting anything other than the AT&T network may not work. Once you have done this you should be able to make the network selection stick. This will only last until you reboot and you will need to redo the process over again. I do not know if switching Airplane mode on and off will cause the need to redo it but you can test it out to check.
Thanks! It works! Thanks for your help! i will only have to use this till I can make good backups again
trh1341 said:
Thanks! It works! Thanks for your help! i will only have to use this till I can make good backups again
Click to expand...
Click to collapse
Glad I could help.
Sent from my SAMSUNG-SGH-I747

[Q] keep auto connect to LTE

Hey!
So my M919V has LTE disabled..basically doesn't have under mobile network and network mode: "LTE/GSM/WCDMA (auto connect)" .
I can't flash tmobile modem due to AUTH: Fail, and secure check fail.
I flashed stock, original i337M rom and it got me the LTE option: under mobile network and network mode: "LTE/GSM/WCDMA (auto connect)" .
then I flashed back the original M919V stock rom. I have the "LTE/GSM/WCDMA (auto connect)" option, but the rom naturally goes to "GSM/WCDMA (auto connect)" only, even though the LTE is present.
So, when i pick the LTE option and reboot phone, it switches back to GSM/WCDMA . How do I fix this, i want it to always stay at "LTE/GSM/WCDMA (auto connect)".
Please help?
im on stock original windmoile 4.2.2 firmware - M919V .
Do you have this APN?
Biker1 said:
Do you have this APN?
Click to expand...
Click to collapse
No, the only APN i see is
"Bell internet" my carrier APN.
LimitsX said:
How do I access the APN?!
Click to expand...
Click to collapse
Settings
Connections
More networks
Mobile networks
Access Point Names
Biker1 said:
Settings
Connections
More networks
Mobile networks
Access Point Names
Click to expand...
Click to collapse
lol Thank you for that, i figured it !
So, i wrote that i only see "Bell internet" APN only.
so im connected to "4G" my rom doesnt say LTE idk why. but i have to manually connect it, like i said in my original post. but it switches to just GSM/WCDMA one after I reboo my phone.
I want it to stay at LTE/GSM/WCDMA, though.
LimitsX said:
lol Thank you for that, i figured it !
So, i wrote that i only see "Bell internet" APN only.
so im connected to "4G" my rom doesnt say LTE idk why. but i have to manually connect it, like i said in my original post. but it switches to just GSM/WCDMA one after I reboo my phone.
I want it to stay at LTE/GSM/WCDMA, though.
Click to expand...
Click to collapse
The issue being why isn't the LTE setting locking in after Boot.
The LTE setting is there which you can manually set. But upon Reboot, you have to manually set it again?
Suggestion would be to ODIN Samsung Stock Firmware. Make sure the Firmware is for your ddevice.
ODINing back to stock will flash the stock ROM, Recovery, Kernel and Modem, and get you back to where you were prior to your issue.
If you're running a custom ROM/Recovery, install those afterwards.
But first see if your issues are resolved.
Biker1 said:
The issue being why isn't the LTE setting locking in after Boot.
The LTE setting is there which you can manually set. But upon Reboot, you have to manually set it again?
Suggestion would be to ODIN Samsung Stock Firmware. Make sure the Firmware is for your ddevice.
ODINing back to stock will flash the stock ROM, Recovery, Kernel and Modem, and get you back to where you were prior to your issue.
If you're running a custom ROM/Recovery, install those afterwards.
But first see if your issues are resolved.
Click to expand...
Click to collapse
I am already on a original stock rom though :S .
LimitsX said:
I am already on a original stock rom though :S .
Click to expand...
Click to collapse
I'm not sure, although I've read about this happening before. To clarify, it used to auto lock, but now it isn't. Can you remember if you made any changes prior to the issue appearing?
App installs, Kernel changes, etc.
I understand you're on stock now, but were any changes made which caused the issue, which prompted you to flash Stock Firmware, but the issue remained?

[Q] LG Optimus G No network (Help please)

I had the CM11 rom...flashed the Vanir rom and since have not been able to get any network. I made a backup before and reverted to that backup but now theres no network even in CM11...I am using the LG F180S...Help please :\
neaznc021 said:
I had the CM11 rom...flashed the Vanir rom and since have not been able to get any network. I made a backup before and reverted to that backup but now theres no network even in CM11...I am using the LG F180S...Help please :\
Click to expand...
Click to collapse
I had similar problem.
I'm on E975 and I was able to get networks connecting manually because LTE is on by default (but it was always droping)
After changing to 3G no more problems. Have you tried this?
P.S. I never tried to solve the 4G issue but probably I need to change APN settings.
rimsilva said:
I had similar problem.
I'm on E975 and I was able to get networks connecting manually because LTE is on by default (but it was always droping)
After changing to 3G no more problems. Have you tried this?
P.S. I never tried to solve the 4G issue but probably I need to change APN settings.
Click to expand...
Click to collapse
Mine doesn't even recognize the network. Can't even search for it manually. I reflashed the KDZ and flashed the baseband still no network :\
Don't understand what you mean... after reboot you get any message? What do you have in status bar? the red cross over the signal icon?
That what I was getting...
You can't go to setting - more - mobile networks - network operators and seach networks? Why, it's grey?
rimsilva said:
Don't understand what you mean... after reboot you get any message? What do you have in status bar? the red cross over the signal icon?
That what I was getting...
You can't go to setting - more - mobile networks - network operators and seach networks? Why, it's grey?
Click to expand...
Click to collapse
Yeah I;m getting the red cross. When I was in CM 11, I tried searching for networks manually but it would just be a loop. So I reflashed the LGF180S KDZ and I am back to stock. Still I have the red cross and the stock rom does not allow to search for networks manually.
neaznc021 said:
Yeah I;m getting the red cross. When I was in CM 11, I tried searching for networks manually but it would just be a loop. So I reflashed the LGF180S KDZ and I am back to stock. Still I have the red cross and the stock rom does not allow to search for networks manually.
Click to expand...
Click to collapse
I'm with E975 stock ROM and I have the options to search network, as I mention above and you should have too.
The problem here could be that it's grey and you are not allowed to do it, but the option is there, is that your case?
I'm not sure if I had that before (you know so many flashes...) but I've always solved my issues by restoring to a previous works ROM. I remember that I got GPS issues too and I restore a ROM backup.
I believe that I can't help more
flash baseband and you're done
and8eye said:
flash baseband and you're done
Click to expand...
Click to collapse
tried and didn't work...Had to flash e975 kdz and flash f180s modem through CWM
me also have the samr problem.where to het naseband?
Sent from my LG-E975 using xda app-developers app
This post may help yu... Use it as reference
http://forum.xda-developers.com/showthread.php?p=47101752
Sent from my LG-E975 powering Stock 4.1.2
first if you read a little and ask in the Vanir rom thread if you can't see which of the 2 roms are for your phone, you need to have the correct modem flashed to the rom aswell, plus using the right APN's or else you can have network trouble.
i am running stock CM11 on my own E975 and it don't have any mobile network when i do a reboot or a cold boot, but then i go in and search for network and all networks in my country shows up, and i just choose the one i want and i get 3g/4g LTE no problem there

No 4G

I've searched and tried the suggestions here and installed creepers (very cool) and still only 3g I'm on the latest Emotionos on my 910v with newest twrp. This is a great rom and I donated anyway but has anyone had any luck getting the 4 g back?
sportytony said:
I've searched and tried the suggestions here and installed creepers (very cool) and still only 3g I'm on the latest Emotionos on my 910v with newest twrp. This is a great rom and I donated anyway but has anyone had any luck getting the 4 g back?
Click to expand...
Click to collapse
Do a full firmware flash. Use the clp1 without recovery and aboot. That's the god fix. Then flash your rom again. All good.
sportytony said:
I've searched and tried the suggestions here and installed creepers (very cool) and still only 3g I'm on the latest Emotionos on my 910v with newest twrp. This is a great rom and I donated anyway but has anyone had any luck getting the 4 g back?
Click to expand...
Click to collapse
flash this then in settings go to more under wireless & networks then mobile networks then access point names then in the three dot menu reset to default and reboot your phone
weard1212 said:
flash this then in settings go to more under wireless & networks then mobile networks then access point names then in the three dot menu reset to default and reboot your phone
Click to expand...
Click to collapse
Thank you thank you! Worked like a charm! I thought I searched everywhere and was freaking that I was gonna have to start from scratch. But this was perfect. I hope someone else finds this and thanks you.
weard1212 said:
flash this then in settings go to more under wireless & networks then mobile networks then access point names then in the three dot menu reset to default and reboot your phone
Click to expand...
Click to collapse
After I flash the zip, should I still wipe dalvich cache before rebooting? Thanks
dhplap said:
After I flash the zip, should I still wipe dalvich cache before rebooting? Thanks
Click to expand...
Click to collapse
no, its not necessary for this.
Worked for me as well(!)
Flashing LTEfix.zip, then resetting networks to default worked for me as well.
Samsung N910V (trtlevzw) EmotionOS 20170129-OFFICIAL Baseband (modem) N910VVRU2CPF3.
Was only seeing 3G, now see 4G. Not sure if that's a change in indicators or actual 4G (LTE-A), but it seems to have worked.
Thanks!
weard1212 said:
flash this then in settings go to more under wireless & networks then mobile networks then access point names then in the three dot menu reset to default and reboot your phone
Click to expand...
Click to collapse
Hi, I was wondering if you could point me in the direction of the thread where the lte fix came from. I just want to do a little more reading on it. Thanks
There are no words, weard1212! I owe you a beer or pizza! I was gonna have to buy a N4 off swappa since losing 4g a week ago. THANK YOU SO MUCH SIR! The ltefix got my 4g back!!!
I do have a new issue though. I'm on emotionOS build 20170328, baseband cfp3 as well. In global network mode I still only get 3g, but 4g works fine when I switch to wcdma/lte. Even weirder: in the expanded pull down notification bar it says "no service" where it should say "Verizon wireless" under the cellular data quick tile button (4g still works though). Any ideas, I'm almost back to being perfect! Thanks again friend!
okay so I can't send texts over lte/cdma? They work on global/3G but not when I have 4g. I'm certain this can be fixed and that's it not hardware. Please, anybody have experience or opinions? Ran the flash twice now, reset apn, network settings and restored nandroids. On global mode under apns it's blank, "the apns for this user cannot be displayed". Flash a different modem perhaps?
weard1212 said:
flash this then in settings go to more under wireless & networks then mobile networks then access point names then in the three dot menu reset to default and reboot your phone
Click to expand...
Click to collapse
Old thread but if you are still around do you know what file the binary in this zip is replacing?
droidzer1 said:
Old thread but if you are still around do you know what file the binary in this zip is replacing?
Click to expand...
Click to collapse
system/etc/apns-conf.xml

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