INSTRUCTIONS :
1 Open UMT
2 Vivo special TAB
3 Use manual method
4 Select firmaware
5 Select erase userdata
6 Connect phone
7 Password unlock.
8 Frp bypass
Oppo a53 no auth loader | CPH2127 No Auth File Hose Loader | Oppo A53 F17 Unlock Umt New Custom Loader
Link to download click here
Password gsmhexo