iPhone 3GS is far from perfection, actually so far that we’ve stumbled upon pretty serious flaws lately, like the overheating issues. Some white models even suffered from discoloration, but have no fear, ’cause Apple has published a guide showing users how to keep their iPhones within acceptable operating temperatures.
You can find the guide here and keep in mind that Apple recommends operating procedures of 32 degrees, up to 95 degrees Fahrenheit. Apple also claims that low or high temperature conditions might shorten your battery life and even cause the handset to stop working.
Here are a couple of signs showing that overheating is imminent, or it has already started: the phone stops charging, the display dims, cellular signal becomes weak and you’ll see the screen pictured in the image above.