Issues

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A780

The phone does not charge with the USB data cable

Perhaps your phone is completely discharged. At this point you need to use the USB power supply. Take a look at A780#Charging_modes.

The phone does not charge on my USB hub

The device you connect your phone to must supply about 500 mA (milliamps). When plugged into a keyboard with a built-in USB (for example), the phone will not charge (Windows will notify you of this). This is because the keyboard does not provide power. Other devices may provide power, e.g. so-called self-powered hubs.

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