While talking, press the multifunction key once to end the call.
Please confirm whether mobile phones support voice function, if support, then
follow below steps to use voice function:
1.Press and hold the volume keys "+" or "-" for 3 seconds to activate voice function
on phone.
2.Press and hold the volume keys again for 3 seconds to exit voice function on
phone.
Press multi-function key twice quickly.
End the call
Voice
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