I upgraded, not clean install, via the Developer program. 6 mo. old 4S.
Battery life was very bad even if only 3 apps running, and I turned off Locations services and Notifications and all that I could turn off.
Maps was very cool and I liked the OS in general, but YES the phone got hot in my hand and ate battery life like never before.
I am going back to 5.1.1 now.
They better figure that out, I supposed the phone is running a lot of stuff that has to do with beta, and will be turned off later.
The back is getting really hot with general use, Anyone else have this?
Using GPS while on iOS 6, my phone gets almost too hot to touch. I also can't charge it enough while driving either to keep the battery full. My phone cruelly died while being plugged in when diving with GPS (Waze) running.
Also, I am lucky to get even 6 hours to a charge now.