Apple have released iOS 6.1.1 for the iPhone 4S that fixes a battery drain issue connecting to 3G. Yesterday Vodafone warned iPhone 4S owners not to upgrade to iOS 6.1 due to the connectivity issues.

Apple say the update “fixes an issue that could impact cellular performance and reliability for iPhone 4S” and the update isn’t available for any other iOS devices.

 

About iOS 6.1.1 Software Update

This update fixes an issue that could impact cellular performance and reliability for iPhone 4S.

For information on the security content of this update, please visit this website:

http://support.apple.com/kb/HT1222

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