From this site you will download file that can remove payjoy on ZTE tab v971lm by firmware flash file
Before flash: Please keep in mind that flashing firmware to your phone will erase everything on it, including the contents of internal storage. It is always a good idea to back up your data to an external storage device or a PC. If your phone is bricked, stuck on the logo, and cannot be accessed, I believe there is nothing you can do to backup your data.
How it work ZTE tab v971lm payjoy remove file with firmware
- SOLVE HANG ON LOGO PROBLEM WITH FILE
 - REPLACE UNKNOWN BASEBAND
 - REMOVE THE FRP FROM YOUR PHONE
 - REMOVE PAYJOY, PATTERN, PIN, PASSWORD, etc.
 - FIX A DEAD PHONE AFTER FLASHING WITH THE WRONG FILE FIX OTHER SOFTWARE PROBLEMS.
 

