I am surprised that no one did talk about the huge SMS problem in iOS 6 !!! Messages are disappearing.. Particularly the messages that came from companies, banks, carriers.. (these messages are identified by a name and not a number.. And are not ususally in your contacts list..) I can see the text in the preview, but as soon as I open the message/thread all content is gone, and the empty thread moves to the bottom of the list. Remember it's only related to SMS that came from companies (Banks, Carriers..) and that the affected messages are the ones that were received prior to the update. To top this out, if you receive the next message from the sender related to the actual disappearing messages, your previously received messages won't show up again, never. I lost important data without prior notice!! Bank statements, online payment receipts, carriers bills.. I already checked a couple of phones and they all share the same bug. I think this is related to the security bug that was discovered earlier (SMS Spoofing) and that apple fixed in iOS 6.. The only info that I can find is a small conversation on apple's discussion forum (link) https://discussions.apple.com/message/19665054?tstart=0#19665054?tstart=0 This is a very serious problem that you should shed a light on!!