Normally we don't give much credence to a single tweet pertaining to rumors about the next iPhone, but this one comes from Eldar Murtazin, editor-in-chief of mobile phone blog Mobile-Review. Murtazin has a history of accurately predicting mobile phone rumors and in this tweet he says that the iPhone 3GS will not be upgradable to iOS 5 when it debuts this fall: "Just one comment. Apple iPhone 3Gs wont be upgradable to iOS 5.x. iPhone 4 will."
Apple dropped support for the original iPhone in iOS 4 and limited support to certain features of iOS 4 on the iPhone 3G, so some might think it's obvious that iOS 5 will not support the iPhone 3GS -- a two year old phone by the time the new operating system shi
