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[HELP] mobile network connections won't function after upgrading to cm12 firmware

I've used CM12.1 based ROMs for a while now, and with my talent have managed to brick my bacon (oneplus one global 64GB), and unbrick it (using this guide)
I've restored it to stock with no problem using this tool.
my problem begins when i try to update to any LP ROM - flashing such ROMs' zip files in TWRP returned "E: error executing updater binary in zip". i found two solutions to this error:
1. first one is described in this thread. i ditched this method after it got me stuck in bootloop every time after flashing a ROM
2. second one (probably the way it should be done) is to update device firmware like described in this oneplus forums thread. flashing this zip indeed allowed me to successfully install my ROM but with one big problem - the SIM card is detected for a few seconds (even then the device wont find any networks) and then drops to "no SIM card detected - emergency calls only" then it gets detected again and so on...
I've also tried flashing some different modems like described here but it didn't change anything
have anyone encountered any network related problem after upgrading to a CM12.1 based ROM or have any idea how to solve my problem (mobile network connections won't function after upgrading to cm12 firmware)?
help would be very appreciated!
edit: if it helps, i also found that OTA updating to the latest build XNPH44S also breaks the phone's ability to connect to a mobile network

Get the oneplus one build which was released as a fix to ghost touch.. It is nothing but oxygenOS!! Backup ur data and follow the instructions and flash the oxygen rom then wait for the first boot after first boot just update ur recovery to latest twrp and get the bacon firmware update zip file from any of the major rom threads like blisspop or exodus then flash that then flash the latest cm12.1 nightly and AK kernel(optional) then boot it up!!!
Transmitted via Bacon

yashshan said:
Get the oneplus one build which was released as a fix to ghost touch.. It is nothing but oxygenOS!! Backup ur data and follow the instructions and flash the oxygen rom then wait for the first boot after first boot just update ur recovery to latest twrp and get the bacon firmware update zip file from any of the major rom threads like blisspop or exodus then flash that then flash the latest cm12.1 nightly and AK kernel(optional) then boot it up!!!
Transmitted via Bacon
Click to expand...
Click to collapse
1. TWRP must be installed before installing OxygenOS as it comes as a flashable zip and not an OTA/Cyanodgen update...
2. installing OxygenOS was no problem without the firmware, however after it booted i noticed it broke my mobile communications in a very similar way, so no luck with that one.
3.even after installing oxygen the firmware update is required to install anything like a CM nightly or a CM based LP ROM, and my problem was that this firmware upgrade broke my network connection, so i don't see how that could help me in any way
3.1 after flashing OxygenOS not even the firmware update would allow me to install a different ROM...
4. i linked the forum thread my firmware update came from (also found a similar suggestion in a YouTube video) and couldn't find any reference to it in any of the main ROMs' threads like you suggested, they all just say to install TWRP wipe everything and flash their zip (some say to flash a nightly before)
any other ideas? I'm starting to get desperate around my suddenly not-so-functional bacon :crying:

!!SOLVED!!
steps:
1. flash the latest CM12S fastboot image
2 .delete line 2 "aassert(oppo.verify_trustzone("TZ.BF.2.0-2.0.0109") == "1");" from the updater-script file in the custom ROM's ZIP installation file
3. flash the "hacked" zip file with no problem
4. enjoy your custom ROM installed bacon, WITH your mobile connection.
thanks for the help anyway!

Unable to get OTA Updates installed on TWRP - Need to go back to stock recovery

Hi All,
Background:
Installed TWRP recovery to downgrade to KitKat from Android ver 5.0.2 / COS 12.0 YNg1TAS17L
( I guess the changes in lollipop made me to do so).
But after installing TWRP, for some reason or other I did nothing and now the issue is the OTA are not getting installed. From other similar thread I know that we can download the OTA zip and install through TWRP and I am not looking to get into that...as I am giving this device to my family.
Help Required:
1) Is there a way to uninstall TWRP and go back to stock recovery without losing any data?
( Is it as simple as flashing recovery image from the Stock ROM?)
2) Using the OnePlus tool kit can we flash the stock ROM which will also restore the stock recovery?
(If so is it possible to flash the latest ROM 5.1.1 or CM12.1)
I just need guidance here with steps on what will be the best and safe approach without frying up my device.
Please suggest

droidfry said:
Hi All,
Background:
Installed TWRP recovery to downgrade to KitKat from Android ver 5.0.2 / COS 12.0 YNg1TAS17L
( I guess the changes in lollipop made me to do so).
But after installing TWRP, for some reason or other I did nothing and now the issue is the OTA are not getting installed. From other similar thread I know that we can download the OTA zip and install through TWRP and I am not looking to get into that...as I am giving this device to my family.
Help Required:
1) Is there a way to uninstall TWRP and go back to stock recovery without losing any data?
( Is it as simple as flashing recovery image from the Stock ROM?)
2) Using the OnePlus tool kit can we flash the stock ROM which will also restore the stock recovery?
(If so is it possible to flash the latest ROM 5.1.1 or CM12.1)
I just need guidance here with steps on what will be the best and safe approach without frying up my device.
Please suggest
Click to expand...
Click to collapse
Numerous other threads on the same subject... I don't understand why you are not ready to flash the OTA through TWRP but you are through stock recovery... It's the same thing... Don't use toolkit, they are the ones, in 99% of the cases, that "fry" your phone... As soon as TWRP is installed no OTA will automatically, you will have to flash them manually.

got a question

I was on a custom build of android 6 and had twrp and then I got an update and installed it. Now I have lost TWRP... Is that even possible? Also when in recovery it says can't mount sdcard!

Was it a custom ROM based on stock 6.0? If it is, it's possible that the update was pushed to the phone because Google sees the phone as running a stock ROM and only a stock recovery can install a stock recovery.

What I don't get is how and why users running custom roms receive and accept stock OTA notification updates.
If you had twrp installed, then the OTA would not install - it would fail.

help moving from CM11 to LP

so i got my mate7 over a year ago and right from the start i installed cm11. i only had the stock rom for a week. its been so long that i forgot this phone has a fingerprint scanner. i have decided to flash the latest huawei rom and then shortly after flash KangVIP. the problem is that i dont know where to begin.
im currently running CM11 from this thread. i installed TWRP using acbka's tool (thanks!). so, where do i go from here? im guessing i go to stock recovery and then do a serious of stock firmware upgrades. the problem is i dont know which ones.
my phone model is an MT7-L09 (im in the US if that matters). im hoping i can get LP installed before the spring semester. any and all help is appreciated. thanks and happy new year.

For coming back to huawei stock rom from CM11 I usually:
(Wipe /data and /system from recovery)
Flash from recovery this ROM http://forum.xda-developers.com/mate-7/development/rom-erykinemt7-v1-0-0-mt7-l09-b137sp03-t3044695 or any kitkat rom that comes with flashable zip
Flash the stock kitkat recovery (Option 1 from acbka's tools)
Flash a stock kitkat rom (this for example --- I didn't try flashing Lollipop stock rom here, you can just try it or install kitkat stock then lollipop stock) using huawei update tool (you have to put the stock rom in /dload folder, then go to settings, update and start a local update). It's important that you have flashed the stock recovery in the previous step because a non-official recovery won't let you install huawei software.
Now you can receive OTA updates
(I use cwm recovery but I think that it's just the same with twrp)

Marshmallow OTA Update - Update Cyanogen Recovery?

Hi, today I received Marshmallow OTA update (13.0-ZNH0EAS2JK, not yet installed), this is a great news but I also get a popup window says :
WARNING : Update Cyanogen recovery is disabled. This may cause issues with updating your device.
Please enable Update Cyanogen recovery in Developer options
Ignore / OK
1. Should I ignore the message or I have to enable Update Cyanogen recovery?
2. Right now I use TWRP, will the cyanogen recovery override the TWRP or not?
3. Just to make sure, upgrading to Marshmallow doesn't delete data and apps, right?
Btw right now I'm on CM 12.1.1-YOG7DAS2K1 (Lollipop) rooted.

this will not affect the update but your device may well not allow the update unless you re-flash CM recovery first then after updating again re-flash TWRP

For ota you should be in stock recovery not in twrP and stock rom ,Enable update cm recovery in developer's options.no data loss .

So before installing update, I need to re-flash CM Recovery or just enable it from Developer Options?

cliffflip said:
So before installing update, I need to re-flash CM Recovery or just enable it from Developer Options?
Click to expand...
Click to collapse
Toggle on the "update cyanogen recovery" from Developer menu and flash the stock recovery.
You probably need to flash the stock ROM too which includes the stock recovery.
When i switched from cm12.1 with twrp to cm13, just flashing the stock recovery didnt work for me, I had to flash the stock cm12.1 ROM

COS 13 bacon signed zip for fastboot and twrp posted in oneplus forum
https://forums.oneplus.net/threads/cos-13-full-zip.445052/
I flashed via twrp , working well.