• Change PIN: ** 04 * [old pin] * [new pin] * [new pin] #
• Show IMEI number: * # 06 #
• Hide your number when calling someone: # 31 # phone number
• 2nd call service: you are calling and someone else is trying to reach you. You can switch between conversations with this.
Activate: *#43#
Deactivate: #43#