bq aquaris v plus imei repair needed
 

Hi there.
bq aquaris v plus imei repair needed.
phone is with unknown baseband and after checking imei only get serial number.
i tried all first 5 methods and nubia method in hua generic tool qualcomm tab (as indicated in your step by step guide) diag port enabled adb enabled unlocked bootloader.
in some cases software says imei written ok hard reset phone from menu to make changes but even after hard reset phone keeps without imei.
android 8.1.
in most cases software is unable to make adb connection with phone while i can control phone from adb and fastboot 1.4.2.
twrp installed but i could not make root.always getting encryption error reset the phone.tried different supersu ad magisk.

what is phone chipset?