If you feel daring, try the rest option and flashing the device firmware again specific to the AT&T Lumia. I did this and overall I have seen improvement in the device. I don't all of a sudden have sharper looking photos from the camera or the "abc" app from the "xyz" market that we all had to have show up eventually otherwise Windows Phone as a platform was going to die. However, my battery runs cooler. Is it placebo? Here is a pretty good test to see if you've moved away from hot to warm to luke warm:
Run a game for twenty minutes and then touch the phone to your spouse in the middle of the night. If its hot, they will jump out of bed screaming. If it is warm, they will twitch and look over to you asking what that was. If it is luke warm, it likely won't be noticed.
Do not drop Lumia 920 on unsuspecting spouse. This could cause immediate injury, possibly death. If you feel that a Lumia 920 has been dropped on you or a loved one, first look for flatten or compressed areas on the body. It is not unusual to see entry and exit wounds as the Lumia is quite capable of making smooth punctures in and out of the human body. If by some chance the Lumia 920 had fallen through multiple concrete barriers prior to impact with an individual, it may be possible for the phone to become stuck inside the victim. Do not move the victim!!!! It is very possible that you or another bystander could risk serious injury attempting to lift the Lumia 920. If you have access to a crane, forklift or you are attending a strongman contest it will be to your advantage to seek out professional help.
If your Lumia has overheated, speed up the cooling process by lowering the temperature of your home to that of below freezing. Keep a towel handy as the phone will "sweat" during the cooling process. Do not use your Lumia 920 to fry eggs, bacon, etc. The yolk will be on you then.
In the event of terrible puns, run.