[Q] [Cm 12.1] 4g/lte connection problem - G3 Q&A, Help & Troubleshooting

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?

Related

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] [Virgin Mobile] Galaxy S3 Lte Connection on CM 12

I recently rooted my s3, and flashed the Cyanogenmod 12.1-20150527-NIGHTLY-d2spr ROM.
3G and lower works great, but I am unable to connect to the LTE network. I initially believed it was an APN problem, and flashed this: (android forums -> virgin-mobile-mod-universal-lte-virgin-mobile-apn-fix-wip-cm-aosp-4-4-x.840298), without success. I tried updating/adding apns manually, but still am unable to connect to 4G.
My model is SPH-L710, and current baseband is L710VPUCNDC.
Let me know if you have any advice/solutions!
sudo!! said:
I recently rooted my s3, and flashed the Cyanogenmod 12.1-20150527-NIGHTLY-d2spr ROM.
3G and lower works great, but I am unable to connect to the LTE network. I initially believed it was an APN problem, and flashed this: (android forums -> virgin-mobile-mod-universal-lte-virgin-mobile-apn-fix-wip-cm-aosp-4-4-x.840298), without success. I tried updating/adding apns manually, but still am unable to connect to 4G.
My model is SPH-L710, and current baseband is L710VPUCNDC.
Let me know if you have any advice/solutions!
Click to expand...
Click to collapse
To get LTE, clean flash (wipe cache, system, and data on TWRP or use the "clean to install new ROM" option on PhilZ) the ROM, Gapps, and the APN fix and then boot up. As soon as your phone finishes booting up, turn it off, go into recovery, and dirty flash (don't wipe anything) the ROM and Gapps.
I used this on AICP 9.0 which is based on CM12.1, and I've heard this procedure works on CM12.1 and any CM12.1 based ROM.

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?

Stuck on 2G/edge data network

I have got this annoying issue with my sim card. Currently running cm9 eol and i don't get 3g data internet on this device. I have tried on other phones and 3g works flawless. I have also tried other sim card on galaxy w but im still stuck at 2g. I have tried to check on gingerbread different custom roms and it still doesnt work. I have also updated the baseband to xxlmb. Also tried changing apn. Sim network is Aircel(India)

[SOLVED]No LTE after modem/baseband flash

Hi.
I got problems with signal drops every 10 sec or so.
So I tried to flash 21C, 21A and 20P modem without any luck.
Was first when I also flashed RPM/TZ my signal drop problem was solved.
But, I got a new problem.
I can't get any connection on LTE.
It's like I'm not allowed on the LTE-network, its grayed out with a !.
No problem with surf on GSM and UMTS/WCDMA.
Using TurboRom.
Do I need to try this?
http://forum.xda-developers.com/lg-g3/general/request-3g-2g-lte-d850-t3300908
Or is it some other solution?
I installed RR custom rom and now LTE works.
I guess I just needed to flash the modem a second time.

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