3. When the battery is full, disconnect the charger from the phone, then from the wall outlet.You don't need to charge the battery for a specific length of time, and you can use the phone whileit's charging.If the battery is completely discharged, it may take up to 20 minutes before the charging indicatoris displayed.Tip: You can use USB charging when a wall outlet is not available. Data can be transferred whilecharging the device. The efficiency of USB charging power varies significantly, and it may takea long time for charging to start and the device to start functioning.Make sure your computer is switched on.First connect the USB cable to the computer, then to your phone. When the battery is full, firstdisconnect the USB cable from your phone, then from the computer.Connect the headsetEnjoy your favourite music, or free your hands for other things when in a call.The headset may be sold separately.Connect the headset to your phone.Do not connect to products that create an output signal, as this may damage the device. Do notconnect any voltage source to the audio connector. If you connect an external device or headset,other than those approved for use with this device, to the audio connector, pay special attention tovolume levels.Antenna locationsLearn where the antennas are located on your phone to get the best possible performance.© 2015 Microsoft Mobile. All rights reserved. 12