Apple has unveiled the latest generation of its iPhone smartphones - named the iPhone 6 and iPhone 6 Plus.

Apple CEO Tim cook was centrestage to reveal the two different-sized versions of the iPhone 6 at an event in the Flint Center, California. The location is historic as the place where Steve Jobs first unveiled the Macintosh computer. Cook called it the "biggest advancement in the history of iPhone".

Apple announced that the iPhone 6 starts at $199 with a two-year contract in the US, going up to $299 or $399 for the respective models (16GB, 64GB, and 128GB).

The iPhone 6 Plus starts at $299 with a two-year contract in the US, going up to $399, or $499 for the 16GB, 64GB, and 128GB models respectively. Both versions come in gold, silver, or space gray.

Pre-orders open from 12 September, 2014. The phone will be available from 19 September in the UK, US, France, Hong Kong, Canada, Germany, Singapore, Australia, and Japan.