First Step: Check the Exact Model. Dial *#899 then click software version. To sure na model number.
2nd Step: Power Off the unit. Open Unlocktool, click oppo and search the model number (RMX2020).
3rd Step: Click Factory Reset, then Press and Hol Vol up and Vol down.
And wait...
Fist Step. Hard reset. Power off the unit. Hold Vol up and power button. Click Clear All Data.
2nd Step. Open Unlock tool. Click vivo then search vivo y15a
3rd Step. Pag open ng Unit saksak ang Micro Usb cord. Then balik ulit sa Unlock tool, Click (Prealoader) Erase FRP.
Then...
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