Your GSM device needs a Subscriber Identity Module (SIM) card to authorize your device on the Rogers Wireless GSM network. It's a tiny gold computer chip that contains your wireless subscriber profile to authorize a GSM device to use Rogers service such as making and receiving calls. The SIM card contains your customer number and your personal phone book.
You can insert your SIM card into another GSM device to make and receive calls on the Rogers Wireless GSM network without reprogramming the device.
Your SIM card is identified by a unique serial number (located on the back of the card). A SIM card has no expiry date. It is active as long as your service is active on the Rogers Wireless GSM network. Advancements and expansion to the Rogers Wireless network such as LTE will require compatible SIM cards which may lead to rare instances where SIM card replacements are necessary.