Nearly one week after complaints of cellular-linked issues by several iPhone 4S users in the UK and Europe, Apple has released the iOS 6.1.1 version for the handset, in order to fix a bug in the most recent iOS 6.1 release.

The iOS 6.1.1 patch issued by Apple for iPhone 4S has come after users reported that the iOS 6.1 upgrade was making cellular and 3G networking problematic. With a 3G-related bug evidently hitting the iOS 6.1, the UK and European cellular networks had cautioned their iPhone 4S users to refrain from the downloading of the update.

The new iOS 6.1.1 patch - released by Apple after exactly two weeks of the roll out of the company's latest major iOS version, the iOS 6.1 - has been issued by Apple just five days after it was handed out to developers for testing.

According to an Apple announcement, the latest iOS 6.1.1 over-the-air update has either already become downloadable for some of the iPhone 4S users in the European Union (EU); or it will soon be available for download for all the users of the handset.

Going by Apple's official release note pertaining to the iOS 6.1.1 patch, the latest software update "fixes an issue that could impact cellular performance and reliability for iPhone 4S."