UPDATE for my experience.
After my upgrade I also experienced all the items listed here (Heat, Battery drain, wifi issues).
This is what I think might be happening. When you first update I think the system must be doing some type of heavy duty maintenance items, such as re-indexing the storage or converting file system, defragging or something. This would explain the hot phone syndrome that occurs and then cools off after several hours at least on my 32gb iPhone 4S. This possible high CPU utilization would also explain the fast battery drain.
I ended up letting the battery drain fully and then recharged to 100% (while i slept overnight). This morning I took the phone off the charger at 8:00 am. It stayed at 100% battery for over 1.5hrs. BTW I used it for email, phone calls and listened to over two hours of pod casts in the morning. At lunch I was at 60%. I use the phone for calls and web surfing this afternoon and the phone lasted until 6:30pm before the phone shut off.
I think if you let the phone die and recharge a couple of times the problems will work themselves out. Just give it a day or two.
Looks like the battery might need a "calibration" cycle or two to get straight.
FYI... The wifi is now working. I think this was an issue with Apple that they fixed yesterday, but I still want to be able to turn off the "auto logon" like in IOS 5
After my upgrade I also experienced all the items listed here (Heat, Battery drain, wifi issues).
This is what I think might be happening. When you first update I think the system must be doing some type of heavy duty maintenance items, such as re-indexing the storage or converting file system, defragging or something. This would explain the hot phone syndrome that occurs and then cools off after several hours at least on my 32gb iPhone 4S. This possible high CPU utilization would also explain the fast battery drain.
I ended up letting the battery drain fully and then recharged to 100% (while i slept overnight). This morning I took the phone off the charger at 8:00 am. It stayed at 100% battery for over 1.5hrs. BTW I used it for email, phone calls and listened to over two hours of pod casts in the morning. At lunch I was at 60%. I use the phone for calls and web surfing this afternoon and the phone lasted until 6:30pm before the phone shut off.
I think if you let the phone die and recharge a couple of times the problems will work themselves out. Just give it a day or two.
Looks like the battery might need a "calibration" cycle or two to get straight.
FYI... The wifi is now working. I think this was an issue with Apple that they fixed yesterday, but I still want to be able to turn off the "auto logon" like in IOS 5