The Apple iPhone, it’s had a few problems in the past, so are you experiencing problems such as email retrieval issues or GPS problems? Maybe you accidentally upgraded your Apple iPhone operating system and realise the firmware can’t be unlocked?
Whatever the reason or problems you may be experiencing with your upgraded Apple iPhone or Apple iPhone 3G there may well be an easy way to sort it out, and that is by opting for a quick Apple iPhone OS downgrade.
One should remember though, downgrading isn’t the most efficient or convenient way of dealing with these problems; having said that if you don’t want to continue pull your hair out over it then an iPhone OS downgrade as a late resort may just sort it all out.
To find out how to downgrade the iPhone OS visit the source.
Source — intomobile