Apple bills the iPhone 5s as the "most forward-thinking iPhone ever". With fingerprint-scanning technology, a hugely improved camera, more power than most desktop computers and a wholly redesigned operating system, it could well be right.
The iPhone 5S is the first iPhone to feature biometric security, in the shape of the Touch ID technology embedded in the home button. That means you can unlock your handset with your fingerprint alone and keeps your phone and your personal information out of the wrong hands, even if it gets stolen. It also makes having to remember passcodes a thing of the past.
Touch ID's not just there for the nasty things in life, though. It also allows you to authorise purchases from the App Store and iTunes without having to input a password. You can even set up the phone to remember four other fingerprints, so those you trust can answer your iPhone 5s or access your information if need be.
New phones are always touted as more powerful than previous generation models. But very few get upgrades on the scale of the iPhone 5s. This excellent handset's A7 processor, which is the first 64 bit chip to feature on a phone, is twice as powerful as the A6 processor of the iPhone 5. The result is a phone that snaps to attention and handles 3D graphics as ably as your home computer.
Easing things along is the M7 coprocessor. By helping out with the heavy lifting, it takes the strain on the A7 so that there's no slowdown no matter how many apps you have open. But that's not all. It also measures motion more accurately than earlier iPhones, making the iPhone 5s terrific for sports and fitness apps.
Power pretty much always comes at a cost. In the case of smartphones its usually battery life. Not so the iPhone 5s. The great thing about the A7 and M7 is that both chips are energy-efficient and combine to maximise the iPhone 5's battery.
Cameras are reliably excellent across the iPhone range. The iPhone 5s's improved eight-megapixel iSight camera is the best yet, however. That's thanks to a 15% larger sensor and a larger aperture that's been increased to ƒ/2.2, which mean more light. In turn, that means more vibrant, more true-to-life colours. Of course, there's an extensive range of filters and panorama mode too for when you want to creative too.
Web browsing doesn't come much faster than with the iPhone 5s. 4G connectivity results in mobile internet speeds that make 3G look slow in comparison, with buffer-free streaming, better browsing and super-fast downloads.
Underpinning everything that's great about this handset is iOS 7. Not only does it look lovelier and brighter, it now offers improved multi-tasking, the Control Centre feature for one-swipe easy access to key settings and a suite of revamped apps.
Other noteworthy features of the iPhone 5s take in an HD FaceTime camera, HD video recording with 3X zoom and a massive array of apps and games to choose from.