Modo Recovery
>>adb sideload
Brand : ZTE
Model : Z899VL
Operation : Reset FRP
Searching for device in sideload mode...Found
Authorizing Device...Done
Resetting FRP Lock Data...Done
Please check phone screen and reboot phone.
Operation Finished.
UltimateFRP Ver. 0.4
(https://www.gsmarena.com.mx/gallery/1_06_04_21_1_04_58.png)