Difference between Iphone 4 & 5?

Just wondering if there are lots, as I'd like to get rid of the phone & carrier I have now.

The 5 will be thinner and be a true 4G. It will be a Sprint exclusive Everything else is speculation

Oooh I know this one - the iPhone 4 is out now and the iPhone 5 isn't?

The iPhone 5 will be slightly thinner, and will be a little bit faster.
Somebody has said the iPhone 5 will be exclusive to Sprint. However if you live in the UK, you will probably be able to get a factory unlocked one. Or you could order a factory unlocked one online from the United Kingdom (when it comes out) and then keep your carrier if you are not with Sprint, or are planning to change.

The iPhone 5 can't be much different than the 4/4S because Apple never make major changes at a time (except Siri, I guess).

The iphone 5 is rumored to look almost the same as the 4s maybe be a little thinner and longer to have a 4 inch display. The phone will probably 4G compadible and probably faster processor and more ram and it will run ios 6. But remember nothing is set yet apple is going to unvaile the phone on september 12 though.

Announced sept 12th, for sale 2 day later.
att and verizon get it first, sprint 4 week later.