Develop Bugs

Low 4G signal after rooting/flashing CM4.1.2 then to 4.1.3...

Hi all,
I rooted my Rogers S3 then installed with CM4.1.2 last week then updated to 4.1.3. I've noticed since I updated to 4.1.3 that my 4G signal maxes out at 2 bars. So am wondering if the ATT rom that is used has a different baseband file then Rogers? And if so, is it possible to install a Rogers baseband back onto the phone some how?
Thanks...

Pretty sure there is no android 4.1.3 version. And there is a thread with flashable modems u can try...

[Q] Newbie modem question

Hello all. I have a I9195T (Telstra, Australia - Serranoltexx), which I took the plunge and rooted (thank you arco68!) and then installed CM10.2 direct from the CM wiki page. This is working great, but I am bit confused as to how the modem works. I appear to have retained my baseband (phew!), but wonder how this translates to using other custom ROM's from XDA etc.
If they are made for a different baseband (but for I9195) is it possible to backup the MODEM firmware, flash another ROM and then flash the MODEM over again to retain the baseband? If this is possible where do I find the MODEM firmware to back it up? I've had a search but I think I am missing the really low level understanding of how the MODEM itself fits into the ROM picture.
Any help appreciated, even if its just a search term suggestion or link.
edit: I should put my baseband is I9195TDVUAMH1, using 1800mhz LTE.

DroidNine said:
Hello all. I have a I9195T (Telstra, Australia - Serranoltexx), which I took the plunge and rooted (thank you arco68!) and then installed CM10.2 direct from the CM wiki page. This is working great, but I am bit confused as to how the modem works. I appear to have retained my baseband (phew!), but wonder how this translates to using other custom ROM's from XDA etc.
If they are made for a different baseband (but for I9195) is it possible to backup the MODEM firmware, flash another ROM and then flash the MODEM over again to retain the baseband? If this is possible where do I find the MODEM firmware to back it up? I've had a search but I think I am missing the really low level understanding of how the MODEM itself fits into the ROM picture.
Any help appreciated, even if its just a search term suggestion or link.
edit: I should put my baseband is I9195TDVUAMH1, using 1800mhz LTE.
Click to expand...
Click to collapse
As far as i know our devices does not have any limitations concerning flashing ROMs and having an "incorrect" Modem.
I would recommend though to have always the latest modem.

DroidNine said:
Hello all. I have a I9195T (Telstra, Australia - Serranoltexx), which I took the plunge and rooted (thank you arco68!) and then installed CM10.2 direct from the CM wiki page. This is working great, but I am bit confused as to how the modem works. I appear to have retained my baseband (phew!), but wonder how this translates to using other custom ROM's from XDA etc.
If they are made for a different baseband (but for I9195) is it possible to backup the MODEM firmware, flash another ROM and then flash the MODEM over again to retain the baseband? If this is possible where do I find the MODEM firmware to back it up? I've had a search but I think I am missing the really low level understanding of how the MODEM itself fits into the ROM picture.
Any help appreciated, even if its just a search term suggestion or link.
edit: I should put my baseband is I9195TDVUAMH1, using 1800mhz LTE.
Click to expand...
Click to collapse
You can get some more info via this thread:
http://forum.xda-developers.com/showthread.php?t=2545784

[Q] G3 D857 no 4G signal

My G3 is D857 and I bought it from China. I can't find 4G LTE signal in the US. The carrier is T-mobile. I've tried both settings in the *#*#4636#*#* and 3845#*857#. Neither did work. I also tried to search the lte config.apk in the Root Explorer, but I couldn't find it. The device has been rooted. The software info is as follows:
Android 4.4.2
Baseband: MPSS.DI.3.0.c6.2-00008-M8974AAAAANAZM-1
Software version: D85710c-CUO-CN
Can anyone fix this problem? I'd appreciate it very much.

Hi there.
Are you on KK or Lollipop?
From the Modem number I suspect that you have a KK Modem/Baseband. [when I was on KK I had a 00008 modem. v20h is 00048]
If you are already on Lollipop, you ought to flash the v20h Modem which is the adequate one.
You can use Search on the Forum and get v20h.
You should then notice changes.

Thx a lot for your reply.
It's KK now.
Do u mean that the KK does not support 4G LTE on my phone?
ac3ofS2 said:
Hi there.
Are you on KK or Lollipop?
From the Modem number I suspect that you have a KK Modem/Baseband. [when I was on KK I had a 00008 modem. v20h is 00048]
If you are already on Lollipop, you ought to flash the v20h Modem which is the adequate one.
You can use Search on the Forum and get v20h.
You should then notice changes.
Click to expand...
Click to collapse

No it probably means the phone doesnt support the frequency that T-Mobile runs its 4G network on. T-Mobile's 4G network runs on 1700 mhz and 2100mhz while the phone only supports networks running on 800/1800 and 2600 mhz
and please do not listen to the person, V20H is only for D855 variant. Please do not think flashing random things from other varians onto your phone will work.
It will result in brick and youll wont be able to do anything about it since US LG Service Centers dont repair international variants

Could someone get me a good modem?

Hi everyone,
I'm having issues with data... flashed latest CM12 and it's reallt bad now. I am in France with Android 5.1.1, could someone help me finding the best modem to flash ? Also, where to find it? I am new to flashing modems so I don't want to screw up, thanks

3g and 4g not working in fulmics

I have lg g3 d850. I have successfully installed fulmics rom 6.0. But my 3g and 4g is not working now, it was working before in stock rom. What should i do now? Plz cooperate

inamqazi96 said:
I have lg g3 d850. I have successfully installed fulmics rom 6.0. But my 3g and 4g is not working now, it was working before in stock rom. What should i do now? Plz cooperate
Click to expand...
Click to collapse
Try reflashing the rom. Or use the newer version of it. ie, fulmics 6.5.
Check your apn also
G3 D855---ROM : #DU ---Xposed

Yesterday i updated to latest version. But still 3g and 4g are not working

Apn is fine also

inamqazi96 said:
I have lg g3 d850. I have successfully installed fulmics rom 6.0. But my 3g and 4g is not working now, it was working before in stock rom. What should i do now? Plz cooperate
Click to expand...
Click to collapse
Use RootExplorer app and navigate to /system/app and delete folder LTEConfig, reboot after deleting.

There is no such folder

I'm having this issue too. Help somehow.

Same bug here D850

In my case its sim card fault. check it! It's not a phone fault!

I was able to get mine to work but it keeps cutting out no matter what I do on my d850. I switched to N&N. It's been running really well.

Same issue here..
LG d852 using in India. After flashing fulmics (no addon, stock settings) 3g is not working anymore.
Initially was lg d852g and after flashing fulmics it bacame lgd852. Now updated apn and installed latest OTA but no luck..
any one can please suggest how to make 3g work again on vodafone india. with fulmics rom

jacob05 said:
Same issue here..
LG d852 using in India. After flashing fulmics (no addon, stock settings) 3g is not working anymore.
Initially was lg d852g and after flashing fulmics it bacame lgd852. Now updated apn and installed latest OTA but no luck..
any one can please suggest how to make 3g work again on vodafone india. with fulmics rom
Click to expand...
Click to collapse
It might be the wrong modem that you have installed for your phone. I remember that the first time I flashed Fulmics I had the same issues.
You need to find and flash the correct modem for your phone and country. In my case it's modem 21C, otherwise I get connection problems.
You can find a flashable ZIP of the modem on the forum.