Develop Bugs

No Data (GPRS / HSPA / LTE) after CM 10.1 Upgrade

Ok, I've tried this a few times and am now frustrated.
I upgraded from CM 10 to CM 10.1. The phone appears to work correctly for an hour or two, and then I lose all cellular data connectivity on the phone. Going into the data configuration mode shows that it is configured for LTE, but is unable to even connect to GPRS. I flashed back to stock and everything works correctly. Re-install CM 10.1, same thing-- data for about an hour, then nothing. Flashed back to stock and then to a restored version of CM 10, everything works great.
I would like to move to CM 10.1, but I need data connectivity (I'm funny that way ). Anyone else have a similar experience? Any suggestions?
Thanks!
Jim

TDBearCT said:
Ok, I've tried this a few times and am now frustrated.
I upgraded from CM 10 to CM 10.1. The phone appears to work correctly for an hour or two, and then I lose all cellular data connectivity on the phone. Going into the data configuration mode shows that it is configured for LTE, but is unable to even connect to GPRS. I flashed back to stock and everything works correctly. Re-install CM 10.1, same thing-- data for about an hour, then nothing. Flashed back to stock and then to a restored version of CM 10, everything works great.
I would like to move to CM 10.1, but I need data connectivity (I'm funny that way ). Anyone else have a similar experience? Any suggestions?
Thanks!
Jim
Click to expand...
Click to collapse
ROMs have their own APN settings usually. I would delete what's in there and put it all back it manually.
Also try *#*#4636#*#* make sure that looks kosher in there.
And I just read this
SERVICE MENU
****************
*#197328640#
Code to remove Restriction: 11865
then
SERVICE MENU
****************
*#197328640#
Code to disable lte - 1187226
Code to re-enable - 118721
Sent from my SGH-I747 using xda premium

double check your imei too

3G does not work on CM12

Hello, i have a trouble with unworking 3G on my LS970 on CM12. When i flash stock, or custom rom i have 3G working, but when i flash CM12 it is not work. Data toggle don't turn on ethernet. In settings in item "about" the mobile network state is always disconnected, and dont turn on. What i do wrong?

I'm having the same issue. LTE works great, but 3G just gives me an !
I thought maybe it was because I had updated a few nightlies without a full wipe... but even after flashing ZVC, getting good connections and installing the latest nightly clean, I get the same issue.

[Q] [Cm 12.1] 4g/lte connection problem

Hello, I'm using offcial CM 12.1 nightly and I'm having trouble connecting to lte. The thing is I changed my sim card few weeks back, messed around in hidden menus, flashed various modems and I still can't connect. When I put any other SIM into my phone, lte works and there are no problems. Any ideas?

I have a similar porblem with LTE an CM12.1. The official CM12.1 and all based-on-it roms doesn't connect to LTE. Only H+. When I flash the AOSPA-L Rom, LTE works fine.
When I bach-up the Modem in TWRP and flash CM12.1 again and restore the modem, LTE still doesn't work. Any help?

Cm 13 nİghtly 3g problem

Hi all.
i flashed last nightly version of CM 13 to my d855.
I have two problems.
1- Mobile networks choosen at LTE (recomended). I cant change it. 2G or 3G option is looks like selectable but nothing happened when i select it. Phone always staying just 2G (edge) mode.
2- After the phone call there is a message appear on screen: Invalid number (with bleeping)
if you have any idea for the fix this problem please write.
Thanks.

musluzut said:
Hi all.
i flashed last nightly version of CM 13 to my d855.
I have two problems.
1- Mobile networks choosen at LTE (recomended). I cant change it. 2G or 3G option is looks like selectable but nothing happened when i select it. Phone always staying just 2G (edge) mode.
2- After the phone call there is a message appear on screen: Invalid number (with bleeping)
if you have any idea for the fix this problem please write.
Thanks.
Click to expand...
Click to collapse
I had the same as your Nº 1 Problem, i tried to go to *#*#4636#*#* and force the phone to change to 3g but it didn't work either.
So i went back to my previous rom (XenonHD 5.1.1) y enter the menu on *#*#4636#*#* and select wcdma prefered (and i dis change).
I flash again CM 13, and the phone got 3g, but i can`t change the network mode, so i only got 3g or 2g.
i think that the rom doesn`t actually have the right permissions to change that now, hope it gets solved.
Hope you find this helpfull. And sorry if i misspelled some word, english is not my home language.

Thanks i got clearly. Not my home language too

1. As for your signal problem, depends on your carrier as CM is trying to be universally available to all carriers.
2. And as for the "invalid number" error, it is a very well known CM 13 issue according to CM moderators and developers and has been pushed to get fixed in upcoming nightly releases.
Source: http://forum.cyanogenmod.org/topic/118917-lg-d855-invalid-phone-number-error/

Have the same number 1 problem. Htc one m8 dual.

Preferred network type won't change

Hi,
i'm currently running the latest CM13 and have a problem with the Preferred network type. It stays on "LTE (recommended)" and i can't change it to 3G or 2G. In Phone information (*#*#4636#*#*) it stays on "GSM only" and won't change to anything.
When i go back to LG's Stock 6.0 all changes work. With previous versions of CM13 (first 5 versions i think) it works also.
Does anyone have any idea?

Chipstepper said:
Hi,
i'm currently running the latest CM13 and have a problem with the Preferred network type. It stays on "LTE (recommended)" and i can't change it to 3G or 2G. In Phone information (*#*#4636#*#*) it stays on "GSM only" and won't change to anything.
When i go back to LG's Stock 6.0 all changes work. With previous versions of CM13 (first 5 versions i think) it works also.
Does anyone have any idea?
Click to expand...
Click to collapse
I have the same issue on my LG G4 h815. I cleanly flashed the latest nightly of CM13 (cm-13.0-20160102-NIGHTLY-h815.zip), after first upgrading to the stock 20A image and installed TWRP. I flashed CM13 using TWRP. Then I flashed nano gapps. H+ is the fastest cell tech here, and my phone just can't use the cell network (it seems to connect, but never shows H+ and no data bits are routed). And when I went into the menu to select 3G as the preferred network, it won't let me change it from LTE. It clicks when I choose 3G and 2G, but the selection stays on LTE. When I go into the special menu for radio options, same thing, I can't select a different network mode (it simply stays on the current selection). Wifi works just fine, but cell phone use doesn't work -- no calls, no data. I also upgraded to the next nightly, but it didn't make any difference in behavior.
@Chipstepper Can you tell me which CM13 image worked? I'm going to try cm-13.0-20151125-NIGHTLY-h815.zip ..

Same Problem here on my Moto X 2014. I tried every CM13 nightly between Christmas and early January. I was never able to change the Radiobutton in Preferred Networks and connection in phone information was always GSM only. I also tried a clean flash of the cm-13.0-20160108 nightly, still the same problem.
Now I switched back to my CM12.1 backup where it's working.
Can somebody name a nightly where it's confirmed working?