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Press Back key to go back to previous menu.
Power Key
Short press on the Power key shall lock the screen and a long press
on the Power key shall switch on/off the device.
Icons
Show the SIM1’s current network signal level.
Show the SIM2’s current network signal level.
Show the power level of Battery.
You have missed calls in SIM.
Alarm is set on.
The headset is plugged in.
Bluetooth is powered on.