Try this.. May be work, I don't know, cuz I didn't upgrade my phone to iOS6 cuz of these reasons!
http://www.idownloadblog.com/2012/09/28/how-to-downgrade-ios-6-to-ios-5-...
Try this.. May be work, I don't know, cuz I didn't upgrade my phone to iOS6 cuz of these reasons!
http://www.idownloadblog.com/2012/09/28/how-to-downgrade-ios-6-to-ios-5-...