An article in the Wall Street Journal 's Digits column on July 28 , 2010 , reported that iPhone 6 3G phones updating to iOS 4 responded slowly .
An article in the Wall Street Journal 's Digits column on July 28 , 2010 reported that iPhone 3G phones updating to iOS 4 responded slowly , had diminished battery life , and became excessively hot.
IPhone 3G