iOS 5 won't run on 2009's iPhone 3GS, claims analyst and Mobile Review editor Eldar Murtazin. "Just one comment. Apple iPhone 3Gs wont be upgradable to iOS 5.x. iPhone 4 will," he explains in a Twitter post. While there are no more statements to support the rumor, Murtazin has in the past obtained unexpectedly accurate information, such as early knowledge of the Nokia N8. Since a preview is anticipated at WWDC in early June, iOS 5 could be far enough into development for specifications to leak.