Released last month, the iPhone 5s comes in silver, gold or space grey aluminium, and boasts a 64-bit A7 chip which Apple claims makes it 40 times faster than the original iPhone.
The device offers 10 hours of talk time over 3G and 40 hours of music playback.
It also includes a fingerprint scanner in the home button which allows the user to lock the device and be sure that only they can access their data.
The cheaper iPhone 5c is made from hard-coated polycarbonate and is available in a choice of colours – blue, white, pink yellow and green.
It also offers 4-inch Retina display, the same A6 processor as last year’s iPhone 5, and 8MP rear camera.