Is an American iPhone the same as a UK iPhone?

Like are all the internals the same? And would an American iPhone work here in the UK if you bought it unlocked? Everyone says all iPhones are the same round the world and I think it would work, but I was just confirming.

Yes, all iPhone's are the same, but as you say it will need to be unlocked for it to work. Only thing that will be different is the mains charger, but you can buy a USB plug cheap enough anyway!

Different prices though. Different currencies.

It's pretty much the same. The language set in it also changes. You wouldn't like an iPhone with Japanese only, right?

American cellular phone systems work on different frequencies to the British system so it would need conversion which with the current state of electronics means replacing the main circuit board and it's components. I don't know how much that would cost but it is probably cheaper to get a British phone to start with.