The iPhone 5 will work with the first 4G network to hit the UK, Everything Everywhere's EE network. However, because it only latches onto the 1,800MHz spectrum band, the iPhone 5 will only work with EE's network, and not with O2 and Vodafone's upcoming 4G services, unless they sell their own version of the iPhone 5. The new phone will probably work with Three's network, once it's up and running, and Virgin Media is in talks with EE to get 4G using that same spectrum. It's complicated and there's a lot we don't know.
4G brings faster mobile browsing, with speeds that (theoretically, at least) formula case for apple iphone x and xs - black/orange far exceed those of 3G, There are several other phones confirmed to support this new tech coming to the UK, including the Samsung Galaxy S3 LTE and Nokia Lumia 920, Because 4G is so new to the UK, and because operators have been slow to get their networks running, most iPhone 5 owners won't experience the LTE speeds the phone is capable of, That said, it's likely to be a year before all three major UK operators have 4G up and running (by which time we'll be contemplating the iPhone 6), so you may never miss 4G on this iPhone, If you're enthusiastic about trying the nascent 4G service in the UK, you'll need to switch to one of EE's 4G plans..
These results prove the iPhone 5 is considerably more powerful than its predecessor on paper, In practice, there's not much difference between the iPhone 5 and the 4S which, as mentioned above, is still a very fast smart phone, You'll notice the extra power in some cases though, particularly when it comes to processor-straining apps, I exported two 2-minute videos at the highest possible resolution using iMovie on the iPhone 4S and the iPhone 5, to check which was faster, The iPhone 4S got the movie into the phone's camera roll in 5 minutes 18 seconds, formula case for apple iphone x and xs - black/orange while the iPhone 5 blazed past, exporting its clip in 2 minutes 32 seconds, Again, that's twice as fast..
That's useful for those who take advantage of Apple's excellent on-the-go editing app or other bits of high-power software. But again, for the most part, there's not much discernible difference in power between the iPhone 5 and the iPhone 4S, or indeed between this new smart phone and other mobiles like the Samsung Galaxy S3. It seems that processor tech has outpaced app developers, and as with other high-end smart phones, I suspect you'll be hard pressed to find games or apps that push the A6 chip to its limit.