I've done this back up & restore a few times. Providing I had everything ticked on back up and restore it worked fine.

Communication & Calender, Settings and Applications all restored with no hiccup.

By the time it had restored all the applications....grrrrrrrrrr....the restore command took longer (up to an hour) than the several minutes for flasher 3.5 reflash to PR1.2

One've your back up's should contain the convo's you appear to have lost. Maybe several restores until you find the one that contains them ??

If non do then i suspect you didnt have everything (namely communication & calender) ticked whilst backing up.


Fingers crossed for you.