iOS 6.1.1 (Build 10B145) Released For The iPhone 4S Only
Apple has just released the iOS 6.1.1 firmware for the iPhone 4S to fix a variety of bugs that were being reported such as 3G performance issues, Microsoft Exchange issues and even possible overheating problems. Apple’s official statement regarding iOS 6.1.1 for the iPhone 4S is as follows “fixes an issue that could impact cellular performance and reliability for iPhone 4S.”
We recommend that you update to iOS 6.1.1 as soon as possible. You can upgrade to iOS 6.1.1 over-the-air or through iTunes. It’s your choice.