Samsung Galaxy Luna 用户手册

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页码 207
Secure Lock Screens 
You can make calls even if your phone has a secure lock screen. 
1.  Drag 
Phone upward to open the call screen. 
2.  Tap 
Emergency call to display the Emergency dialer. 
3.  Enter the emergency telephone number (911 in North America) 
and tap 
Dial
4.  Complete your call. During this type of call, you have access to 
most in-call features. 
Calling  
54 
Emergency Calls