Utstar xv6700 User Manual

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Using Phone Features
To mute a call
You can turn off the microphone during a call, so that you can hear the caller but the caller 
cannot hear you.
  During a call, tap Mute.
  When the microphone is turned off, the mute icon ( 
 ) appears on the screen. Tap 
Unmute to turn on the microphone again
3.5  Additional Dialing Information
Make an emergency call
  Enter the emergency number for your locale, and tap Talk.
Make an international call
1. 
Tap and hold the 
0 key on the Phone keypad until the 
+
 sign appears. The 
+
 replaces 
the international prefix of the country that you are calling.
2. 
Enter the full phone number you want to dial, and tap 
Talk. The full phone number 
includes country code, area code (without the leading zero, if any) and phone number.