It is the latest of Apples iPhones and It is truly amazing, I have bought it recently and I am very impressed. They have FIXED the problem with the connection and it work fine, but I have had reports about people having trouble when they are on Orange, apparently O2 is giving the best. The display is amazing, It is really clear and perfect for taking pictures with the latest update, HDR, which when you take a photo with it activated, It takes 2 photos and you can compare them and you can definitely notice the difference. The phone is easy to use, It feels nice to hold and it has nearly everything you will need - email, work, games, movies and much more! - They are very sleek the case is much nicer then the previous rounded iPhones, with this being more square and much easier to hold. The 3G works, so you can browse the internet anywhere and you can easily activate it with the 'Settings' App. The voice control which is fairly new to the iPhone works good, but you need to make sure you are NOT in a crowded area. There are a few problems with the iPhone, here I will list them; They case, it is made of glass and you can easily get your fingerprints over it another problem is that it is more liable to smash with the glass cover.
This is really all I can say about the iPhone 4, but I rate it, 4.5 and I have one - If you really want one, it is highly recommended.