prepaid sim card
 

Planning to visit US in August. I would like to know if there is any shops in Baltimore Washington airport and Newark Liberty airport selling mobile phone prepaid sim card. I searched the airports' and 2 carriers' web sites but didn't find any. Please help.

I don't believe I've seen any at the airport in BWI, but I could be wrong. Once outside the airport, you could certainly find inexpensive phones, like Tracfone, etc that have cheap phones with minutes you can buy at some stores. I don't have experience with switching sim cards, as my phone works on different technology. Good luck!