Samsung Galaxy SII Sprint User Manual page 57

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