(Credit: CNET.com)

iPhone Atlas has already covered a number of complaints from iPhone users about iPhone OS 2.2.1. Frequently, faulty Wi-Fi connections were the source of these complaints. Recently, that problem has resurfaced, and one user is linking the Wi-Fi problems to heat generated by the iPhone and its battery.

A discussion in the Apple forum describes a problem in which some iPhones are randomly dropping Wi-Fi signals, then failing to reconnect to any network for a period of time.

Many people think the problem is caused by the iPhone overheating, and some go so far as to place their iPhone into a refrigerator to speed up the cooling process. (We don't suggest you do the same; refrigerating your iPhone could cause water damage and void your warranty.) We recommend letting the iPhone cool at room temperature for 30-60 minutes or until cool to the touch.

Apple Discussions user ScottieWil goes a step further and actually opened his iPhone to apply a nitrogen stick directly to the relevant chip. His Wi-Fi immediately returned to working order. ScottieWil researched the problem further and said in one of his posts:

He also suggested that the iPhone's battery is very sensitive to temperature, which explains why Wi-Fi would work temporarily when the phone was cool, but not later after the phone heated up.

Due to the varied nature of Wi-Fi problems reported, we suggest you follow some of the troubleshooting tips our sister site wrote about previously here and here before contacting AppleCare.

If the tips above fail to resolve the problem, some people on the same discussion thread are reporting that AppleCare is replacing iPhones experiencing this heating problem. However, Apple is only doing so after the iPhone is examined by a local Apple store.

If you or someone you know has experienced this problem, let us know in the comments below.