Read help info
Your PIN protects your SIM from unauthorised use. If use of PIN is turned on, it needs to be keyed in when you turn on your phone. Follow these instructions to turn use of PIN on or off.
Find "SIM Card"
Press the Menu key twice.
Press Advanced System Settings.
Press SIM Card.
Turn use of PIN on or off
Press the Menu key.
Press Enable Security or Disable Security (depending on the current setting).
Key in your PIN and press Enter.
Press the Return key to return to standby mode.