
Sony Ericsson Mugua
Find "Protection"
Press the Navigation key.
Scroll to Settings and press the Navigation key.
Scroll to Security and press the Navigation key.
Scroll to Phone protection and press the Navigation key.
Scroll to Protection and press the Navigation key.
Turn use of phone lock code on or off
Scroll to On or Off and press the Navigation key.
Key in the phone lock code (default is 0000) and press the Navigation key to turn the phone lock code on or off.
Exit
Press Disconnect to return to standby mode.