Tap Factory data reset .
The phone will reboot and erase everything. This takes about 2-5 minutes. Use this method if you forgot your screen lock, password, or the phone is stuck on the logo screen. How to Hard Reset HUAWEI L21 P9 Lite
Scroll down and tap Advanced Settings (on some EMUI versions, look for System ). Tap Factory data reset
Tap RESET PHONE again to confirm.
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