How to delete all contacts and messages?

To delete contacts:
1. In the phone application, press the Menu key.
2. Click View Speed Dial List.
3. Highlight a contact or phone number.
4. Press the Menu key.
5. Perform one of the following actions:
• To change the contact that is assigned to a speed dial key, click Edit. Click a new contact.
• To assign the contact to a different speed dial key, click Move. Click a new speed dial key.
• To delete the contact from the speed dial list, click Delete.

To delete multiple messages:
1. On the Home screen, click the Messages icon.
2. Perform one of the following actions:
• To delete a range of messages, highlight a message. Press and hold the Shift key. Roll the trackball up or down. Release the Shift key. Press the Menu key. Click Delete Messages.
• To delete all messages prior to a certain date, highlight a date field. Press the Menu key. Click Delete Prior. Click Delete.