+1 in USA

I’m moving to the US for a yaer (to start) with, and try to get things done, but now I start to doubt how to save amarican numbers on an american cell phone? Can you store american numbers on your cell phone with +1, or will it not work?

On my danish mobile any number can be stored with ‘+’ and ‘destination country code’ including danish numbers. I.e. it will work calling +45xxxxxxxx, even when in Denmark. Denmark being ‘+45’ 🙂 All my numbers right now are stored liked this in the adress book. +1, +45, +46 (swedish numbers), + etc….

Reading on this page everywhere it is written that calling inside NANP, you should use a syntax like: ‘1’ + ‘area code’ + xxx-xxxx.

What about ‘+1’ + ‘area code’ + xxx-xxx?

the ‘+1’ would be preferable, since the adress bokk wil then be global 🙂