All of a sudden my 680 was getting little to no signal. I tried a few soft resets. I also thought AT&T might be having network problems. Neither seemed to be the real problem.

I did a hard reset. During the restore, my device would reset when it got to the saved prefs file. I had the restore app skip the saved and unsaved prefs files. This seemed to fix the problem. I immediately saw an improvement in my signal coverage.

Have others seen a corrupted Save Prefs file lead to poor cell phone signal quality? This was a new one for me.

It was a bit of a pain reentering all the Registration codes for my apps, but i did not see any other choice.