steps:
1 open mrt 2.60 last update
2 select mtk tools
3 select format(unlock)
4 select bbk vivo only
5 in init boot select x21i only
6 press vol up to go to recovery>advavance option> REBOOT WITH ADB
7 driver https://www.4shared.com/rar/B0t2xuFmgm/y81i_adb__cdc.html?
8 click start insert usb cable
FRP
close mtk special tools
click asus TAB > ERASE FRP IN USB DEBUG
DONE
LOGS
>>> Device driver identification:
MediaTek USB VCOM (Android)
Version
D1732CF_EX_A_1.11.1
IMEI:861687045110576
Flash ID:90014a484147346132a51652d8548511
>>>>doing factory reset...
>>>>doing factory reset2...
all is done!!!
1 open mrt 2.60 last update
2 select mtk tools
3 select format(unlock)
4 select bbk vivo only
5 in init boot select x21i only
6 press vol up to go to recovery>advavance option> REBOOT WITH ADB
7 driver https://www.4shared.com/rar/B0t2xuFmgm/y81i_adb__cdc.html?
8 click start insert usb cable
FRP
close mtk special tools
click asus TAB > ERASE FRP IN USB DEBUG
DONE
LOGS
>>> Device driver identification:
MediaTek USB VCOM (Android)
Version
D1732CF_EX_A_1.11.1IMEI:861687045110576
Flash ID:90014a484147346132a51652d8548511
>>>>doing factory reset...
>>>>doing factory reset2...
all is done!!!