Samsung Galaxy S

Find "Location and security"

Press Applications.

Find "Location and security"

Press Settings.

Find "Location and security"

Press Location and security.

Choose option

Choose one of the following options:
Activate phone lock code, go to 2a.
Deactivate phone lock code, go to 2b.

2a - Activate phone lock code

Press Set unlock pattern.

2a - Activate phone lock code

Press Next twice.

2a - Activate phone lock code

Press and drag a point to connect at least four points.

2a - Activate phone lock code

Press Continue.
Repeat the selected phone lock code to confirm.

2a - Activate phone lock code

Press Confirm.

2b - Deactivate phone lock code

Press Require pattern to deactivate the phone lock code.

2b - Deactivate phone lock code

Press and drag a point to connect the points in the existing phone lock code.

2b - Deactivate phone lock code

When the box next to the menu item is empty, the phone lock code is deactivated.

Exit

Press the Home key to return to standby mode.