Since the release of Apple's iOS 6.1, users of devices running on Apple's mobile operating system had been complaining of so many issues. Battery drain and Wi-Fi connectivity issues were major ones among all; however with Vodafone UK asking its iPhone and iPad users not to upgrade to iOS 6.1 one of the issues became official, at least from a carrier's side if not Apple's.

With the release of Vodafone UK's advisory, many users of iPhone and iPad who upgraded their devices to iOS 6.1 once again took to tech forums and the battery issue once again popped up.

Vodafone, in the advisory, mentioned that Apple is investigating the issue of iPhone 4S users losing 3G connectivity; however, there is no official statement from Apple regarding the issue.

Comeback of the battery issue was inevitable because of the 3G connectivity issue in iPhone 4S as while searching for network for long time usage of battery goes up which results in battery drain and overheating.

Though the advisory was issued by Vodafone for its UK-based customers only, iPhone users in the U.S. and other parts of the world were also hit by similar problems.

Many users from Malaysia, Singapore, United States, Australia, India, and other parts of the world are posting their problems on Apple's support forum and asking Apple to fix the problem as soon as possible.

Mobile&Apps in its earlier reports suggested people to give it a thought before going ahead and updating their iDevices to iOS 6.1.

Now with Vodafone coming out and asking its user to stay away from iOS 6.1, the wait for Apple's iOS 6.1.1 has started.

Just a day before the Cupertino-based tech giant released iOS 6.1.1 beta for registered developers, and it is expected to be rolled out for public with in some weeks.

Many tech analysts think that the new update of iOS will not address major issues like battery drain, Wi-Fi connectivity and 3G network. Instead, it will only be concentrating on issues related to maps application and Siri.

If you are an iPhone 4S or 5 user and have not updated to iOS 6.1 so far, it's better to wait for a few months and get an iOS version that doesn't turn your expensive iDevices into a fancy paperweight.