Iphone 5

 the iPhone 5 stands 123.8mm tall to allow for the larger 4-inch screenThe excitement of the rumour mill, the titillation of every leaked photo led to higher than ever levels of expectation over the iPhone 5 features, and while the announcement was greeted with some derision at the lack of perceived headline improvements, the record sales tell an entirely different story.

Design:We'll begin in the traditional manner: how the thing actually feels in the hand. With the iPhone 5 there will be many types of prospective buyer: the upgrader from the 4 (or more-money-than-sense iPhone 4S upgraders), those tired of their Android handset and those taking their first steps in the smartphone market and want to get one of them iThingies their friend/child has.Well, all of those picking up the iPhone 5 will have the same reaction: this thing is amazingly light. You've probably heard the numbers by now (20 per cent lighter than the predecessor, as well as beating most of the opposition too at 112g.)There's a very simple way to describe the Apple iPhone 5: thinner, lighter and a bit taller than the iPhone 4S. While that gets across the general look of the phone, it rather underestimates what's gone into the design to achieve this.
SIZE AND WEIGHT
For starters, Apple has managed to shave 1.4mm of the thickness of its previous phone. When you compare them side-by-side, what Apple has done is immediately obvious. While the iPhone 4S' screen and back bulged out from the side, the iPhone 5 has a flush back, while the screen is barely raised at all.It's easy to tell the difference is size from photos, but weight's an altogether harder thing to describe. In pure stats, the iPhone 4S weighed 140g, while the iPhone 5 is 28g lighter at just 112g. Trust us, this is a big difference and it's immediately noticeable when you pick the iPhone 5 up: you get the feeling that it simply should weigh more, it's that light.
While the iPhone 4S and iPhone 5 are clearly related, there are some cosmetic changes to the new model, which give it a different look and help keep the weight down. Gone is the all-glass rear, replaced instead with an aluminium panel that covers most of back of the phone, bar two glass panels at the top and bottom. We've been told that during manufacturing the rear of the phone is photographed with the aluminium panel in place, so that the best-fitting glass panels can be found. Our review model was certainly well put together, with a flush fitting rear.
SCREEN
One of the biggest reasons for the change in size of the iPhone 5 is because it has a larger 4in screen with a 16:9 aspect ratio, rather than the 3:2 aspect ratio used on the iPhone 4S. What this means in practice is that both screens are the same width, but the iPhone 5's is slightly taller, with a resolution of 1,136x640 (the iPhone 4S had a resolution of 960x640), maintaining the same high 326ppi. That's still a Retina display, which Apple defines as a screen where you can't see the individual pixels.