The iPhone 5 features a larger screen, a 4G LTE data connection, an improved camera and a two-tone, aluminium design.
The phone, which comes in black and white, is the thinnest and lightest phone Apple has ever made. The phone is 20% lighter, weighing just 112 grams.
And, frankly, it's a LOT to take in.
So - because we're nice, here's everything you need to know if one handy infographic: