iOS 6.1 beta 4 is now ready for developers to get their hands on. According to 9to5Mac a brand new over-the-air update is hitting the iPhones of devs as we speak. Since the update is so new, we have no idea what kind of treats are packed inside the software. It’s almost certain that this beta release probably carries the usual bug fixes and improvements. Apple is putting these beta releases out promptly, so it shouldn’t be long before we hear the last version is all set and ready to go. The iPhone maker is expected to release the completed version of iOS 6.1 after the holidays.