How do I stop my blackberry from automatically erasing contacts in my address book?

From time to time, I go to look up a contact and that person has mysteriously been erased from my contact list. Blackberry support (which is a joke, worst I’ve ever seen) wants to charge me $50 just to talk with them. I know other people that have experienced the same problem with contacts just disappearing. One time, nearly have of my list disappeared including my parents’ cells. Please somebody help! Blackberry will not…

Related posts:

  1. How can I get changes made to my iPhone contacts to update my Yahoo address book?
  2. Does a Blackberry 8800 use Microsoft Outlook to incorporate contacts into the phone book?
  3. How do I get my HTC phone to stop automatically showing messages when received?
  4. I want to know the address, email address and phone number of ASUS service center in Singapore?
  5. How do I set my BlackBerry to automatically delete messages?