Zte AT&T MF279 User Manual page 9

WARNING!
Your device only supports a nano-SIM card.

To avoid damaging the device, please only use the card that is provided by AT&T and ensure that

the nano-SIM card contacts are facing up when inserting it into the nano-SIM slot.
2. Insert the back-up battery.
3. Replace the cover.
NOTES:
The back-up battery is intended for backup purposes only and may take approximately eighteen (18)

hours to fully charge.
Charge time may be impacted by environmental factors and the back-up battery will stop charging

when the ambient temperature is outside of the temperature range allowed for charging (0°C - 45°F).
○
B Turn on Your Device
1. Plug the power cord into an electrical wall outlet.
2. Connect the other end of the power cord into the Power Input port on the back of your AT&T Home
Base.
3. Slide the ON/OFF button to the ON position and you'll see the power light stays steady
9
green.