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SIM is not detected and unknown baseband after installing ROMs on lenovo A3500-HV

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Thanks Meter: 8
By ebram96, Member on 9th February 2017, 11:47 AM
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My device is Lenovo A3500-HV
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 .
Backup :
- 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
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 !
HTML Code:
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 .
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 :'( .
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a3500, baseband, imei, lenovo, lenovo-a3500, sim

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