First of all download the right TWRP for your device here>>https://bit.ly/1Gv87NF Then......
Boot into TWRP recovery.
From TWRP’s main screen, select Advanced » then Terminal.
Type the following commands in terminal (one by one):
dd if=/dev/zero of=/dev/block/bootdevice/by-name/modemst1
dd if=/dev/zero of=/dev/block/bootdevice/by-name/modemst2
Reboot device.
And you are good to go
Comments