To re-register Visual Voicemail with the network, follow these steps:
1. From your voicemail Inbox, tap New Voice SMS. The compose screen will appear.
2. Tap on the To field to display the keyboard.
3. Use the on-screen keyboard to type activate@vvm.sprint.com (v-v-m, not w-m) in the To field.
4. Tap Record and wait for two or three seconds while the application records a blank message. Tap Stop to end the recording.
5. Tap Send.
6. Wait for at least fifteen minutes and then launch Visual Voicemail.