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i have a curve 8520 and after upgrading my OS my bbm isn't working it gives me a -x- sign , while whatsapp and FB are working can u help ??
It means your message hasing went through if its an x instead of a tick. Perhaps you need to renew your bbm?
Try unchecking "Mobile Network" under "Manage Connections" then putting check back after 5 sec. if that doesn't help try doing a battery pull.