1.open unlock tool
2.click vivo search y91c
3, click preloader frp plus reset
4.power off and connect cable
5.
Selected auth : VIVO [1]
Phone must have battery inside!
Waiting for device... COM22 [PRELOADER:0E8D:2000]
Handshaking... OK
Reading hardware info... OK
Hardware : MT6765 [Helio...
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