Recently apple announced an update to their latest IOS..the IOS7. The 35.4 MB update on an iPhone 5S, brings the latest version to iOS 7.0.6. The update was essential as it was a fix to a dangerous ssl authentication flaw in the ios, this flaw enabled exploitation through (MitM) Man-in-the-Middle attacks.
However, the iOS update turns on Bluetooth automatially.Users should take caution, or at least be aware, that.
To get the latest iOS update, from your iOS device go to Settings >> General >> Software Update, and then tap on “Download and Install”.
The iOS 7.0.6 update is available for Available for iPhone 4 and later, iPod touch (5th generation), iPad 2 and later. Apple also released an update (iOS 6.1.6) for older versions of iOS that supports iPhone 3GS and iPod touch (4th generation).
here is more from Apple’s security notice