How to receive text messages or calls in Europe from the USA

Hi,

I'm a new AT&T customer, I want to find out how I can receive text messages or calls from the USA while I am in Europe.

I'm not looking to make calls, I know there are different options that can be purchased for this - simply would like my phone to connect to a network provider in Europe so I can receive calls.

It's not a pre-paid, it's a AT&T Unlimited &More(SM) One Line contract.

Does anyone have any suggestions?

Thanks!