Samsung SGH-T879 User Manual Ver.lg2_f2 (English(north America)) - Page 16

SIM Card Overview Important! Before removing or replacing the SIM card, make sure the device is switched off. To turn the device off, hold down the key until the Device options screen displays, then tap Power off. The SIM card is loaded with your subscription details such as your telephone number, PIN, available optional services, and many other features. Important! The SIM card and its information can be easily damaged by scratching or bending, so be careful when handling, inserting, or removing the card. Keep all SIM cards out of reach of small children. Some features on your device (such as Wi-Fi Calling) can be unlocked by using a new ISIM (IP Multimedia Services Identity Module) card. To use this new ISIM card, call or contact T-Mobile customer service for more information. This card contains the necessary information for identifying and authenticating the user to the IMS (IP Multimedia Subsystem). 11 If available, you can remove the previous SIM and replace it with the new ISIM card. Installing and Removing the SIM card To install the SIM card: 1. Carefully slide the SIM card into the SIM card socket until the card clicks into place. Correct Incorrect 2. Make sure that the card's gold contacts face into the device and that the upper-left angled corner of the card is positioned as shown.