User's Manual

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Enter the phone number or press options to find the number from the
phone book, Or press Options to select New Call, then enter the number.
Press the Calling Key to dial the second call. The first call will be
automatically maintained.
Mode 2:
Press Options, select to keep the current call, then proceed to dial
another call.
Mute / Restore
Mute and restore, Mute function can prevent the others from hearing
your voice.