Apple has just released a software fix for their latest iOS 6.1 updgrade. The new iOS 6.1.1 update is only available for iPhone 4S users as an over-the-air update or iTunes download. A number of iPhone 4S users who had upgraded to iOS 6.1 reported having problems, including trouble making phone calls, degraded 3G connectivity or problems connecting to the internet. Corporate users reported that their iOS 6.1 devices overloading their company Microsoft Exchange servers. This new update is supposed to have addressed all of the issues.