KGI Securities analyst Ming-Chi Kuo, who has on a number of occasions offered accurate information on Apple’s product plans, has issued a new research note indicating that the iPhone 5S may include a sapphire-covered convex home button housing a fingerprint sensor.

The iPhone has had a concave shaped home button since launch in 2007 but Kuo believes this will change with the change with the iPhone 5s. Apple will to have an advantage over it’s competitors when it comes to fingerprint sensor as Apple is expected to use a RF technology as opposed to the more common optical recognition used in other devices. Optical recognition fingerprint sensor are effected by dust and other contaminants. The use of RF technology will give users a better experience compared to other devices.

iPhone 5s, Fingerprint sensor

Apple is expected to launch the iPhone 5s at a media event on the 10 September. The iPhone 5s will then go on sale a week later and iOS 7 will become available after the announcement.