How Samsung mobile phone unlocks the lock screen is related to the lock screen mode set by your mobile phone:

1. Slide lock: slide the screen with your finger to unlock it.

2. Pattern lock: You can unlock it by drawing the correct pattern on the screen.

3. Password /PIN lock: Enter the set password and click OK or Finish to unlock it.

Some machines also support signature locks, fingerprint locks or directional locks.

1. Signature lock: You can unlock it by drawing the correct signature on the screen.

2. Fingerprint lock: You can unlock it by sliding or pressing the fingerprint at the bottom of the screen, or you can enter an alternate password.

3. Direction lock: Unlock the screen by sliding in four to eight directions (up, down, left or right).

4. Iris: Unlock by recognizing the iris of human eyes.

5. Face: Unlock by recognizing people's facial features.