Apple yesterday fixed 3G and reliability issues with the iOS 6.1.1 firmware update for iPhone 4S users, but a bug with Microsoft's Exchange email service persists. First noticed in the iOS 6.1 software update, it kills your battery and AOL thought it was sever enough to temporarily disable the ability to manage meetings on company-issued devices. Theories abound that an Exchange server glitch is causing poor device performance and battery life and Microsoft just issued a support document providing workarounds for the bug...
Microsoft details band-aid fixes for iOS 6.1 Exchange bug