I am having the same difficulty, I upgraded from 6.0 to 6.1.2 last night. See my thread posted last night after updating. https://discussions.apple.com/thread/4839478 . Since updating while in my primary location my wifi and 3G constantly go in and out. Ive tried resetting network connections, trying toggling "ask to join netoworks" nothing has worked. It seems like a flaw in the OS. Any suggestions or improvements are graciously appreciated.
Is there a way to revert back to iOS 6.0?
An iPhone User.