HTC One M9 - Manual (Page 100)

Phone App 87
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Mute : Mute the microphone during an active call. Tap again to unmute the microphone.
Note: If Mute is activated, the speaker mode is deactivated.
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Speaker : Route the phone’s audio through the speaker (On) or through the earpiece (Off).
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Activate Speaker to route the phone’s audio through the speaker. (You can adjust the
speaker volume using the Volume buttons.)
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Deactivate Speaker to use the phone’s earpiece.
Warning: Because of higher volume levels, do not place the phone near your ear during
speakerphone use.
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Dialpad : Use the onscreen dialpad to enter additional numbers, for example, an extension
or access code.
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For example: When you call your bank’s 800 number, use your dialpad to enter your account
number and PIN.
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Tap to view more in-call options.
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Add call: Tap to initiate a conference call (3-way call).
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Flash: Tap to put the current call on hold.
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People to display your contacts list.
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Open contact card to display the caller’s contact information.
End a Call
There are a couple of options for ending a phone call.