We recommend securing your mobile with a PIN code, and changing it to a personal code. Some devices let you change the PIN code in the phone menu. If this option is not shown, you can change your PIN code manually, by taking the following steps. Enter the following combination into your mobile: ** 04*OLD PIN*NEW PIN*NEW PIN*# and then press the Call button. Would you prefer not to have to enter your PIN code when you turn on your mobile? All you need to do is deactivate this protection. However, you will be exposing yourself to an increased risk of someone else using your SIM card. You are running an even greater risk if your mobile is stolen, because it means that anyone can use it.