Does this help? It's from the Verizon Support site:
What is Backup AssistantSM and why would I want it?
Backup Assistant is a wireless service that saves a copy of your device's address book to a secure website. If your device is lost, stolen, damaged or replaced, Backup Assistant restores your saved address book to a new device wirelessly.
Schedule daily automatic backups or manually back up your address book at your convenience! Login to your web account and get full access to your address book. You can view, print, add, delete and edit contacts. Changes are sent to your device with one click.
How do I get Backup AssistantSM?
To get Backup Assistant, you need to download it to your Get It Now or Media Center-enabled device. Refer to the How to Use Guide: Backup Assistant for instructions on downloading Backup Assistant.