1. Unlock bootloader by using official app
2. Download file below
3. Flash and go
4. Root / backup ... and profit !
Download link:
https://twrp.me/asus/asuszenfone4pro.html
https://www.androidfilehost.com/?fid=889964283620758458
XDA:DevDB Information
TWRP for ZenFone 4 Pro (ZS551KL), Tool/Utility for the Asus ZenFone 4 Pro...
Read more
2. Download file below
3. Flash and go
Code:
fastboot flash recovery twrp-3.1.1-0-Z01G-20171015.img
fastboot oem reboot-recovery
Download link:
https://twrp.me/asus/asuszenfone4pro.html
https://www.androidfilehost.com/?fid=889964283620758458
XDA:DevDB Information
TWRP for ZenFone 4 Pro (ZS551KL), Tool/Utility for the Asus ZenFone 4 Pro...
Read more