Samsung SPHA920 Phone Manual page 137

Note: It is recommended that you perform the complete
adaptation of Digit Dial at least once to achieve the
maximum benefit of this feature. If a partial adaptation is
performed, you can always return later and resume the
process from the halfway point.
Resetting Digit Dial Adaptation
1.
Menu > Settings > Voice Service.
2.
Select Digit Dialing and press
3.
Select Reset Digits and press
4.
Press the navigation key up or down to select Yes and
press
Section 2H: Using Your Phone's Voice Services
.
.
.
113