MacLife has a great article showing 90 of the new things you can do on your iPhone or iPad if you are using iOS 7. No 5 is one of my favourites – especially useful if you are using your phone or tablet abroad. (MacLife)
I take lots of photographs (see my blog for the evidence) so the improvements to the camera, No 51 to 54, are things I will use.
No 6 is not available in the UK – pity I may have been tempted to give Siri a try out – I keep it turned off.
It is worth taking the time and looking at all 90.
Clive