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avigate/
The user can press the up/down navigation key to change the
line or move the cursor in the screen list.
On some Settings and
text editing pages, the user can press the left/right navigation
key to change options or move the cursor in the screen list to
the left/right.
Default is equivalent to soft button confirmation, user
can customize the function.
Return key: it will return to the upper menu under any interface,
and it can be used to reject or hang up when making a phone
call or making a call.
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Press the "Hold" key during the call, the user can hold the call,
and press it again to cancel the holding
and restore the normal
call state.
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Press the "voice mail" button, and the user enters the interface
of SMS and voice mail list.
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In the standby state, ring and ring configuration interface, press
this button to reduce the ring volume;
Press this button to lower
the volume on the call or volume adjustment screen.
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In the standby state, ring and ring configuration interface, press
this button to increase the ring volume;
Press this button to
increase the volume on the call or volume adjustment screen.
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During a call, the user can press this key to mute the
microphone.
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Users can press this key to open the head
set channel
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Press the Redial key to redial the last number dialed
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The user can press this key to open the audio channel of the
speakerphone.
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Long press the DSS shortcut key to enter the setting interface
and set the required functions
7.2 Using Handset / Hands-free Speaker / Headphone
Using Handset
To talk over handset, user should lift the handset off the device and dial the number, or dial the
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