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iOS 6.1.1 update rolled out to iPhone 4S to fix bugs

Apple has released an iOS update for the iPhone 4S that fixes a connectivity problem some users were experiencing.

The iOS 6.1.1 update "fixes an issue that could impact cellular performance and reliability for iPhone 4S," Apple said.

The 86.8MB update comes after Vodafone warned iPhone 4S users not to update to iOS 6.1 because of battery and connectivity problems.

"Some customers may occasionally experience difficulty in connecting to the network to make or receive calls or texts or to connect to the Internet," Vodafone said in a statement. "Apple is working on a solution to their software issue. These connection problems are intermittent."

That solution is now ready for download. To check if your iPhone 4S is ready to update, select Settings > General > Software Update or connect your phone to your PC and check via iTunes. In our office, the update had rolled out to co-workers with the iPhone 4S; iPhone 5 users did not receive any updates.

Apple released iOS 6.1 on 28 January, which added LTE support for more carriers and the ability to purchase Fandango movie tickets via Siri, among other things.