So I switched to a different phone last week. It was my dads old phone he now has a Z10 so today I somehow switched are bbm information from his Z10 to my 9800 torch and my stuff to his. How do I switch it back?
On the Z10, security wipe and restore from a backup, you can use a BB protect backup from the 9800, or do it from BB link. When the device initializes after the security wipe you'll be prompted to enter the BBID. On the 9800, security wipe, and then when you initalize BBM after it restarts you'll be prompted for the BBID, then restore from a backup. Either via a BB protect backup or from desktop manager.
Security Wipe and BB Protect options are both available in the "settings" menu. If you don't have recent backups available, you'll want to make some before doing the security wipes.