Keep your bbm contacts even when you change your blackberry
In recent versions, the backup/ restore feature has kept us sane (for the most part) giving the option to backup your contact list to an email address or SD card. The wasn't foolproof either unfortunately as many still have issues getting their full contact list back for any number of reasons. Thankfully with BBM version 7 (and going forward) you no longer have to worry as your BBM contact list and settings info is now all tied into your BlackBerry ID. In BBM 7, your BBID grabs your contacts and settings list and holds onto them. No longer do you have to backup or restore you contacts manully either from your SD card or by email. All the info is stored in with your BBID, so as soon as you login on your BlackBerry, your BBM contacts are populated and you're good to go.