You can unlock your Android phone even if you've forgotten the passcode, but you'll usually need to factory reset the phone.

Even if you use a fingerprint or Face Unlock to secure your Android phone, neither of those methods can be used as the "main" security method. For example, when you restart your phone, it will require ...

You can lock a Samsung Galaxy S10 with a swipe pattern, passcode, or password. You can also use facial and fingerprint ...