Samsung SCH-I830MSASPR - Manual (Page 178)

170 Section 2I: Sprint Worldwide Wireless Service
Security
This field requires that a Personal Identification Number (PIN)
be entered to use the phone. To enable Security, select the
Require Pin when phone is used check box.
Tone Length
When dialing a phone number, tones are emitted each time a
key is tapped. These tones can be modified to be short, long,
or even turned off. In some cases, longer tone lengths may be
necessary to access automated systems such as voicemail.
1. Tap the Start menu bar located in the upper left corner
of the screen.
2. Tap Settings, and ensure that the Personal tab is
displayed.
3. Tap the Phone icon.
4. Tap the Keypad drop-down arrow and select:
Ⅲ
Tones - When the QWERTY keypad or the onscreen
keyboard for the phone is tapped, a short tone is
played.
Ⅲ
Beep - When the QWERTY keypad or the onscreen
keyboard for the phone is tapped, a beep is played.
Ⅲ
Off - No tones are played when the QWERTY keypad
or the onscreen keyboard for the phone is tapped.
5. Tap to exit.