I have an original iPhone, which I have long been using as an iPod, since taking it out of phone service, that works great in an iHome alarm clock. Several weeks ago when attempting to do a backup after a sync (added some new music) to the iPod app on this original iPhone, iTunes gave me an error message (saying the backup was corrupt & should be deleted - which I did) when attempting to do a subsequent backup. (The sync process worked fine.) Research at Discussions, on this topic, revealed that if the iPhone was put into DFU mode, iTunes would recognize it as a new device and permit a backup. In doing the DFU mode process, the iPhone was restored, but since there's no SIM installed, I can't get back to the state (Home screen setup with the apps) prior to the restore. I've got Time Machine backups going back to when I still had the last backup, in iTunes, for this original iPhone. Where are the Device backups in the OS X file structure? This original iPhone is not bricked; but at present, I can't get past the current & initial, ON screen which shows the "connect to iTunes" along with "No SIM card installed - Insert a valid SIM with no PIN lock to activate iPhone." ...I'm hoping if I can get to the particular & last back up for this original iPhone, I might be able to recover/restore to the previous state of this original iPhone before I deleted this iPhones backup and messed about with DFU (big mistake in attempting when all I wanted to do was to do an updated backup).