Samsung SGH T719 User Manual page 10

1. Remove the battery.
To do so, press and hold the release button at the bottom of the
battery using your thumb (1) and gently lift it in the direction of the
arrow (2). Remove the battery.
2. Make sure the gold contacts of the card face into the phone, then
slide the SIM card into the socket.
Note: When you need to remove the SIM card, slide it, as shown, and take
it out of the socket.
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