Samsung SGH-A637CWAATT - Manual (Page 9)

Getting Started 6
Installing and Removing the SIM Card
Important!: The plug-in SIM card and its contacts can be easily damaged by
scratches or bending. Use caution when inserting or removing
the card, and keep all SIM cards out of reach of children.
1. Remove the back cover and battery.
2. Make sure the gold contacts of the SIM card are face
down, then slide the SIM card completely into the socket.
3. To remove the SIM, slide it gently out of the socket.
Note: The angled corner of the SIM should be inserted as shown above. The
correct insertion is shown on the phone itself. Improperly inserting the
SIM can cause the phone to not recognize the SIM.
Replacing the Battery
1. To reinstall the battery, with the battery cover open, align
the battery tabs with the slots at the bottom of the phone.