Samsung Galaxy Ace

Find "Location and security"

Press the menu icon.

Find "Location and security"

Press Settings.

Find "Location and security"

Press Location and security.

Choose option

Choose one of the following options:
Create phone lock code using a pattern, go to 2a.
Create phone lock code using a PIN, go to 2b.
Create phone lock code using a password, go to 2c.
Turn off use of phone lock code, go to 2d.

2a - Create phone lock code using a pattern

Press Set screen lock.

2a - Create phone lock code using a pattern

Press Pattern.

2a - Create phone lock code using a pattern

Press a point and drag it to connect at least four points to create a new phone lock code and press Continue.

2a - Create phone lock code using a pattern

Repeat the selected phone lock code and press Confirm.

2b - Create phone lock code using a PIN

Press Set screen lock.

2b - Create phone lock code using a PIN

Press PIN.

2b - Create phone lock code using a PIN

Key in the required phone lock code and press Continue.

2b - Create phone lock code using a PIN

Key in the phone lock code again and press OK.

2c - Create phone lock code using a password

Press Set screen lock.

2c - Create phone lock code using a password

Press Password.

2c - Create phone lock code using a password

Key in the required phone lock code and press Continue.

2c - Create phone lock code using a password

Key in the phone lock code again and press OK.

2d - Turn off use of phone lock code

Press Change screen lock.
Key in your phone lock code.

2d - Turn off use of phone lock code

Press None.

Exit

Press the Home key to return to standby mode.