Philips Genie (TCD838)

Type *#2337*# and it will be activate the beep signal when the cellphone reconnected to the net.

Service Provider Lock

The Service provider (SP) lock is used to lock the cell phone to the SP's SIM card. Once the cell phone is locked to a specific operator, if one inserts a SIM card from a different operator the phone will refuse to accept it! The cell phone will however accept another SIM card from the same operator.