OCIA.net has posted an article titled: Apple iPhone WiFi Chill Fix. Below is a direct quote from the article, you can read more over here.
"IA few weeks ago I noticed that the WiFi connection on my phone started acting up, randomly disconnecting and such. I suspected my Belkin router as the culprit, but after testing the phone on other wireless connections as well as having my laptop work perfectly on the Belkin, I knew it must be something else.
I did a good bit of research and came across the crazy idea of putting your phone in the freezer to fix the problem. With nothing to lose, I figured I would try a variant of that method and see what happened."