Samsung Verizon GUSTO 3 User Manual page 40

Initiating a Fake Call
From idle mode with the phone closed, press the
Volume Key Down 4 times.
After the Fake Call Timer period elapses, your phone rings to
notify you of the fake call. If you entered Fake contact Info, it
appears on the screen, or "Restricted" appears.
When you answer the Fake Call, you'll hear the Fake Call
Voice audio (if you selected it in Fake Call settings).
Call Functions 34