when I try to install any rom higher than cm 12.1 , the devices loses its baseband and no longer detects sim cards !
The device is guaranteed to be not bricked : stock firmware and cm12.1 work fine !
what I tried :
Flashing roms with CWM recovery or various versions of TWRP with no errors but in vain .
- The following backup operations also done on cm12.1 which is the only working rom ! -
1- Tried backing up the nvram from my stock rom using various versions of twrp recovery and restoring back on roms but
IN VAIN !
2- Tried backing up using MTK Droid Tools but when I restore the back up on any rom it doesn't work giving this output and after rebooting nothing happens !
In system already available: Android Debug Bridge version 1.0.32 --->>> Connect to device <<<--- ATTENTION! Fake Hardware in kernel or firmware doesn't correspond to phone! --- ERROR :pttycmd1 device NOT found! --- file nvram.bin not selected --- \data\nvram install
Other attempted methods :
1- Installing stock firmware or cm12.1 and dirty flash higher rom .
2- Mobileuncle Tools (I can't access engineering mode !) .
3- Chamelephon .
4- Maui META 3G ( It doesn't detect the device when roms installed ) .
5- Using TWRP terminal and AT+ command .
6- Deleting nvram folder .
I CAN'T ACCESS ENGINEERING MODE ON ANY ROM !
Using codes or Mobileuncle Tools , nothing gets me to the Engineering Mode !
NOTE : WIFI works fine on any rom !
I get all roms from :
and unfortunately the have no English discussion :'( .