How to transfer everything from iphone 4 to iphone 5?

How to transfer everything (incuding cellular data, PHONE NUMBER, and imessage contacts) from an iphone 4 (microsim) to new iphone 5 (nanosim)? Most importantly the phone number.

Easy; Back it up all onto iTunes on your PC, and tell the phone company your working with; "I'd like an iPhone 5 with the same phone number on iPhone 4". And let them do the rest!

Connect to itunes, do a backup. Go get your new phone, when you get home connect to itunes and it will walk you through the setup, just make sure you click the option to copy everything back on it.