BT HTC S620 - Manual (Page 17)

LED indicator lights
Various colours that might display in the two LED Indicators are summarized here.
Top LED Status
Solid green Battery is fully charged.
Blank Battery case is empty, no SIM card inserted or phone is off.
Solid amber Battery is charging or the phone is using ActiveSync to
synchronize with a PC.
Solid red Battery is not installed or battery is over-discharged.
Flashing green Connected to the network.
Flashing red Battery very low (less than 10%).
Flashing amber Battery temperature is hotter or colder than the functional limits
of 0 to 48 degrees Celsius (32 to 118 degrees Fahrenheit), and
has stopped charging.
Amber/Green LED off Battery fault. The “Battery Fault” indicator
(
) is displayed. In this case, the flashing green LED can be
recovered by unplugging the AC adapter.
Bottom LED Status
Flashing blue Bluetooth mode set to “On” or “Visible” mode.
Flashing green Connected to Wi-Fi network.
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