Blueant S1 User Manual page 18

Setting the Primary Phone
You can force the S1 to change the primary phone by doing any of the following:
• Answer an incoming call. The phone receiving the call will become the primary phone.
• Initiate a call from one of the phone handsets. The phone making the call will become the
primary phone.
• Hold
for about 5 seconds. The primary and secondary phones will be swapped.
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