Samsung SPH-D710ZKASPR - Manual (Page 57)

Phone Calls 45
2. Tap DTMF tones to set the length of DTMF tones.
DDTM
1. Press > > and tap Call settings.
2. Tap DDTM to enable making/receiving voice calls or to use voicemail while using mobile
networks.
Voice Settings
1. Press > > and tap Call settings.
2. Tap Voice settings to set options for Voicemail. See Voicemail (Traditional) .
Voice Privacy
1. Press > > and tap Call settings.
2. Tap Voice privacy to enable or disable Enhanced voice privacy to improve the security
of phone calls.