The best iPhone yet, featuring a great camera and the TouchID fingerprint sensor. The high price will put many off, but you'll find a lot of joy in this phone whether you're an iPhone fan or if you've been sitting on the fence. It's more than just an iterative update. Like: Powerful core; Touch ID is a real step up; Excellent camera Dislike: Expensive; No screen tech change; Battery suspect; The iPhone 5S: a phone that looks like theiPhone 5, but goes so much further under the hood. Is that going to be enough to impress the baying hordes?I feel like I've been here before: the iPhone 'S' conundrum. A new phone comes along, taking the shell of the previous model, adds some new bits and pieces, and then claims to be an entirely new phone.*.Buy Apple iPhone 5s - Gold - 16GB- Locked to EE at Rakuten Play.comfor £327.99Which it is, of course. But also it isn't. Well, mostly is. It's the kind of move thatonly Apple can pull off with any kind of conviction: the notion that it can take the same chassis, have a little tinker, throw in a new CPU, slightly better battery and camera, and call it an all-conquering device.*.There's a new flagship on the block. Read ouriPhone 6 reviewThere are a few who question whether it's 'fair' to launch a phone and then append an 'S' to the same thing a year later - Apple's response would likely be that nobody is forcing you to buy the new hardware. And that's a fair point. Yes, this is a phone that bears far too many hallmarks of its predecessor. Andyes, this is the third time Apple has done this.The time is now right for the iPhone 6, with its larger screen and greater abilities inside and out. It's the first timein years we've had a real update to the iPhone design, and its release should give you pause if you're looking at buying an iPhone 5S right now.The 5S is still one of the most expensive smartphones on the market right now, even on 3G plans - although thankfully the price has started to fall.You'll still be looking at around £30 a month to get one without an upfront fee,but Apple has dropped its SIM-free prices following the iPhone 6 and iPhone 6 Plus releases. The 16GB model is now £459, while the 32GB version will set you back £499. The 64GB variant has vanished as an option. Apple is obviously aware of this change, be it the aluminium unibody of theHTC One M8, the new fight into low-light cameras or the need for a strong processor as a headline to shoutabout. And to be fair, it's addressed these needs to some degree or other onthe iPhone 5S.Whether it's the Touch ID home button (which is excellent, more on that later), the jump in CPU power or the fact the camera has, once again, been improvedno end, the iPhone 5S is clearly Apple's attempt at bringing as much as it can tothe party without having to re-design the whole concept all over again.There are many that think releasing the same design twice is cheeky, and there are others who realise that sometimes there's no need for change. It's easy to fall into the former camp, and while Apple will happily point out it's notforcinganyone to buy its phones, its acutely aware the competition is now scarily strong and it needed to bring its best to stay relevant. Design: What can you say about the design of the iPhone 5S that already hasn't been said with the iPhone 5? Let's face it: there's nothing really new here that's going to help you work out if the person sitting opposite you on the train is using the newer phone.Perhaps that's less of an issue now thatthe iPhone is becoming something of a commodity, a device that is so oft-used by the middle-aged generation that it no longer carries the lustre that the exclusivity of the earlier models emanated.That's not necessarily a bad thing either; just because it's not an 'exclusive' design, it doesn't make the iPhone 5S any less premium.It's still a stunning phone to hold in the hand, coming with the all-aluminium-and-glass chassis. There's no doubt Apple has had a look at the way the iPhone 5 range (well, black and white) chipped so badly around the edges. Display: Apple has used the same Retina displayas found in theiPhone 5andiPhone 5C, in the new flagship model. It's a four-inch screen, and comes with a resolution of 1136 x 640, making it still-sharp at 326DPI.It's difficult to recommend the display compared to the rest of the smartphoneworld, as there are definitely better screens out there. TheiPhone 6and theiPhone 6 Plusoffer higher resolutions, and larger displays, and the Plus boastsa higher PPI. Whether this is enough for you with the competition being so far ahead is something I'll leave you to work out.The four-inch size of the screen is goodenough though, as while I might be a fan of the larger screen for movies and internet browsing on the Samsung Galaxy S5 or HTC One M8, the iPhone 5S is a good phone for people that hate the idea of being forced to live with a bigger screen they don't want.It's not perfect though, as despite what Apple would have you believe, the screen is just a tad too large to operate easily with one hand.With a small amount of shifting you can get the thumb all the way across, but given you have to jiggle the phone in the palm a little bit to do so, it kind of feels redundant.In terms of the clarity of the iPhone 5S' display, I'd say it's excellent in terms of colour reproduction and general effect, but there are better displays too choosefrom - theSony Xperia Z2is worth looking at, for example.Many people will be upgrading to the iPhone 5S from the 4S, and this is one of the few areas where, extended size aside, they won't see a large amount of difference.The sharpness is great, the colour reproduction still industry leading, but the brightness can be a little erratic for some low-contrast movies and isn't bigenough for speedy typing. HD movies still look acceptable on the device, but I've seen a much more jaw-dropping effect on rival devices, such as theLG G3.I like that Apple is leading the charge to stop screen sizes going too far in the wrong direction, but there could be something more that's done here.Even a display with a thinner bezel would have impressed (although scaling apps might have been a problem, with is something Apple is so proud of) but I still think in the face of fierce Android opposition the iPhone 5Sdisplay could be better. IOS8: One big change on the iPhone 5S was the fact it arrived with iOS 7. This is clearly the flagship device for the new operating system, and it showed off the UI redesign superbly.The Retina display is clearly calibrated to make best use of the explosion of colour on offer, and the flatter icons look painted onto the screen.And now that we've seen this for a whole year, it's time for a new upgrade -iOS 8has brought a few newrefinements and extra features, and it was swiftly followed by iOS 8.1, which is largely about bug fixes.Neither has really altered the aesthetic established by iOS 7.The new update brings the chance to track your fitness and health (and even your caffeine intake) aswell as connect to more devices within the home.It also finally opens up things like the keyboard, which means you'll be able tocustomise your phone inways you couldn't before.*.The top iOS 8 features you need to know aboutUnfortunatelyApple Pay, a new way of paying for goods and services in store and online, is not going to work on the iPhone 5S because it lacks NFC, but pair with a newApple Watchand you're laughing all the way to the bank (until you see your balance anyway).For those that missed the iOS 7 update, you'd best gird your loins if you're not a fan of colour all over the place. iOS 7 is a lot brighter, cleaner and sleeker than its bloated predecessor, but it does looklike Jony Ive has dipped into his crayon pot a few times. But don't think this is a negative: I like it.The colours on offer are fun, fresh and most importantly distinctive, giving a real unique feel to iOS 7 that other platforms might not have.