coverage, you can call the emergency service at any time
even without a SIM card and USIM card.
Due to the influence of network, environment and
interference, the emergency call may not be dialled
sometimes.
3.4 During a video call
During a video call, press the shortcut button on the screen
to perform the following operations:
Switch the front and the back cameras: realize the switching
between the front and the back cameras;
Mute: close the calling volume at the moment;
Dialling keyboard
: enter into the dialling keyboard interface;
Hands free
: after switching to hands free mode, the current
calling voice is played on the loudspeaker;
Disable a video: turn off the camera;
Disable local display: the local images will be closed;
Far-near exchange: the locations of far and near pictures will
be exchanged;
Bluetooth: after the Bluetooth earphone is connected,
switching to Bluetooth earphone during a call is allowed;
Hang-up
: end a call.
