The iPhone 4s is Apples next iteration in its long standing iPhone line up, sporting Siri the personal assistant, the new A5 processor and a new 8 megapixel camera.

Besides the aforementioned, this is otherwise an iPhone 4!

The Siri personal assistant does work to a certain degree but often misunderstands simple questions, and unlike in the U.S. you CANNOT ask it to find a local business or get it to direct you somewhere or even tell you where you are. However the work around here is to say "Google the nearest Indian restaurant" for example, this essentially will bypass Siri who will instead initiate the internet for your preferred action.

This is something that Apple will hopefully sort out for UK users in the future.

The camera is superior to the iPhone 4, however this was expected. The phone still sometimes struggles when open applications and multi-tasking at times and sometimes freezes for a couple of seconds whilst trying to perform certain actions, but this is a minor irritation.

Overall it is a good phone to own, but upgrading from the iPhone 4, it doesn't really feel like an upgrade at all! But worth considering if your upgrading from the 3gs or older.