Dude I tried everything, a complete restore as new phone also.
I think is related to how iOS 7 manage the network search compared to iOS 6.
As I already said, NO.
my battery sucks also with nothing installed.
With iOS 6 was just fine.
Interesting. I've already derailed this thread a couple of times so I probably shouldn't ask, have you confirmed battery life is bad after pressing "Get Started" and not doing anything else with another iPhone in the same state in the same location? Sorry, "network search" is a broad statement to me and I don't know if you are talking about discovering wifi or cellular networks or something else.