Sim card in two countries

I'm gonna land in Rome in two day then fly to Madrid the following week.

If I buy a sim card in Rome(for my US phone), will I need another one for Spain?

Thanks

no you can use the same but will pay for euro rates when calling italy to spain.
check when buying the sim card in italy on rates bet countries.

Thanks

I may just wait till I get to Madrid to buy the card. I'll only be in Rome 5 nights.


Must go now, I'm off to the airport!

buen viaje