About Your Sim Card; What Is A Sim Card; Exactly What Information Is On My Device Sim - Danger T-Mobile Sidekick Owner's Manual

If you are unfamiliar with Smart Cards or SIM cards, you might be interested to learn more by reading the
following questions and answers:
• What Is a SIM Card? on page 27

• Exactly What Information Is on My Device SIM?

on page 27
• My SIM Card Came Locked! How Do I Unlock It?
on page 28
• Can I Remove My SIM? on page 28

What Is a SIM Card?

A SIM (Subscriber Identification Module) card is distributed to you by your wireless carrier and comes packaged
in a plastic holder about the size of a credit card. After you carefully snap the SIM card from its plastic holder,
your SIM is ready to fit into a slot within your device. The SIM card contains a chip that holds information
required to operate a device. For more information about inserting your SIM card, read
on page 28.
Exactly What Information Is on My Device SIM?
Your device SIM stores the following information:
• International Mobile Subscriber Identity (IMSI) Number - Number that uniquely identifies you as a
subscriber on the network. The number is made up of three parts: a three-digit mobile country code, a
two-digit mobile network code, and a (up to) 10-digit mobile subscriber identify number.
• Mobile Subscriber ISDN (MSISDN) Number - Your mobile telephone number. (ISDN stands for
Integrated Services Digital Network.)
• SIM PIN - A Personal Identification Number (PIN) that you set using the Jump Settings > Key Guard &
Security screen. This code protects your SIM from being used by another person in another device in the
event it is lost or stolen.
• SMS Messages - Short Message Service messages that you receive and save. T-Mobile Phone Messages
messages use the Short Message Service. Note that outgoing messages ("sent") are not saved to the SIM.
• Contact Information - Contact information (name:number) is only stored on your SIM if you've used
your SIM previously in a mobile phone and stored names and numbers in that phone.
Note that you can import previously-stored contact info into your device Address Book by following the
Import Contacts from SIM
instructions in
April 15, 2003

3. About Your SIM Card

on page 126.
• How Do I Handle My SIM? on page 29
• What Happens If I Lose My SIM? on
page 29
• What Happens If I Put A Different SIM
in My Device? on page 29
How to Insert Your SIM
T-Mobile Sidekick Owner's Manual
About Your SIM Card
27