screen.
In order to avoid unexpected touching screen
during the call, the screen backlight will turn off
automatically when the earphone is close to the ear, and
the backlight will turn on when the phone is away from the
ear.
3.1.4 Conference call
When you are in a call, you can add a new call and then
make conference call.
1. Receive an incoming call or make a call, be sure the call
is connected.
2. Press Add call to open dial keypad.
3. Dial a new phone number.
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