Motorola HF820 ユーザーズマニュアル

Redial a number Long 

press 

call button

Put active call on hold 

Resume call on hold 

Answer 2nd incoming call 
(1st call is placed on hold) 

Toggle between 
2 active calls 

Reject a call (phone rings) 

Short press 
power/volume 
button

Reject 2nd incoming call 

End held call 

In call, add 2nd call
(creates 3-way call) 

Long press 
power/volume 
button