One of the fastest adopted updates for iPhone, iOS 6.1, has been updated again. Apple issued a new update, today, that fixes bugs reported on the iPhone 4S. The update 6.1.1 is for iPhone 4S only.
iPhone 4S owners have reported that the new update drains battery life significantly. Vodaphone asked its iPhone 4S users not to install the update at all. In fact Vodaphone noted that iPhone 4S users may not be able to receive calls or SMS after the the 4.1 update. Other iOS 6.1 reported issues between the iOS Mail app and Microsoft Exchange.