Samsung SGH-S275DAATFN - Manual (Page 16)

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Note: If the card is not inserted correctly, the device will not detect it
and no service will be available. If this happens, turn off the
device, remove the card, and reinstall the card in the correct
orientation.
Charging the Battery
Your phone is powered by a rechargeable Li-ion battery. A travel
adapter used for charging the battery is included with your phone.
Use only approved batteries and chargers. Ask your local Samsung
dealer for further details.
You can use the phone while the battery is charging, but doing so
requires additional charging time.
Note: You must fully charge the battery before using your phone for
the first time. A discharged battery requires 4 hours to recharge
fully.
1. With the battery installed, temporarily remove the plastic cover
of the interface jack on the right side of the phone and plug the
travel adapter connector into the jack.
Important! Verify the handset battery is properly installed before
connecting the travel adapter. If the battery is not properly
installed and the travel adapter is connected, the handset
continuously power cycles and prevents proper operation.