How do I restore BBM?
After associating your BlackBerry ID with BBM, your BBM contacts, profile, and group memberships are automatically backed up over the wireless network.
If you switch devices or lose your device, you can restore your BBM data by using the same BlackBerry ID that you associated with BBM. If your BBM contacts appear but you're still missing some of your groups, you can ask someone from the group to add you again.
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