Nokia Bluetooth Stereo Headset BH-903 - Manual (Page 25)

B a s i c u s e
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Mute or unmute the microphone
To mute or unmute the microphone, press the mute key
during a call.
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Switch the call between headset and
phone
To switch the call from the headset to the connected phone,
press and hold the power key (the headset switches off), or
use the keys of your phone.
To switch the call back to the headset, switch on the
headset, or press and hold the answer/end key (when the
headset is on).
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Call waiting
Call waiting is a network service. To use call waiting, your
mobile phone must support the Bluetooth Hands-Free
profile 1.5, and call waiting must be set to on in the phone.