Your phone may ask for your PIN, pattern, or password for security. Enter it, then tap Erase all data again to confirm.
If your Oukitel C35 is unresponsive or you've forgotten your password, you can perform a factory reset using Recovery Mode: how to factory reset oukitel c35 top
Once you see the Oukitel logo, release the Power button but keep holding the Volume button until the Android Recovery screen appears. This screen has a black background with yellow, blue, or white text. Your phone may ask for your PIN, pattern,
: Scroll to Factory data reset (or Yes - erase all data ) and press the Power button again. or password for security. Enter it