More than two weeks ago, Apple iOS update 6.1. released, Update for users of the iPhone 5, iPhone 4S, iPhone 4, iPhone 3GS, iPad 2, iPad 3, iPad 4, iPad mini, iPod touch 4th generation, and iPod Touch Generation 5 is the ability to bring LTE to 36 additional carriers for the iPhone as well as to 23 additional carriers for the iPad. So that more users of the iPhone 5, iPad Mini and iPad 4 could enjoy hardness LTE network in various parts of the world. In addition, of course, there are also many bug fixes and performance improvements.
But it turns out this update contains a bug reported by Vodafone. Vodafone said that the users of the iPhone 4S with iOS 6.1 indicated experiencing problems when trying to access the internet, send and receive SMS, and make and receive calls with the 3G network.
Well, Apple apparently responsive to the bug. So Apple immediately fix the bug with the release of iOS 6.1.1 specifically for the iPhone 4S only. iOS 6.1.1 is a bug fix that warnings by the European operators (including Vodafone). This update can be downloaded directly via the menu OTA Software Update or can be downloaded directly from the Apple firmware files with large around 968MB.
In this update, Apple just write a short release notes are:
‘This update fixes an issue that could impact cellular performance and reliability for iPhone 4S.’