i have an iP4 running 6.01 and have not any problems with it EXCEPT for a few glitches with the siriusXM streaming APP that is corrected by a simple phone reboot. I was having a freeze problem on a game but it corrected itself with 6.01 . Also i have iCloud turned off. I just do local backups to iTunes .
I think it might be the iCloud that is causing the issues, but I need to have a back-up for business purposes. As I said, I can swap over on January 1st. -- If you can't explain it simply, you don't understand it well enough. - Albert Einstein