The easiest way to delete all BlackBerry address book contacts

I believe most people will suggest using wipe handheld feature under Phone Option, Security Options, General Settings. By doing this, all address book contact are deleted, but you will also delete everything in your BlackBerry (all setting had been reset back to default setting too).

What about if I need to delete address book contact only without losing any other information from my Blackberry? Instead of delete your address book contact one by one, actually you can do it with BlackBerry Desktop Manager.

Connect you BlackBerry to PC with USB cable
Run BlackBerry Desktop Manager
Go to Backup and Restore, select Advance, following screen will appear

Highlight “Address book” & “Address book - ALL”, then click the clear button.