I will be coming down to stay at Barcelo Bavaro in Punta Cana this weekend. I'll need use of a cell phone. Is there any way to avoid the $2/min to call back to the US? I realize I could use Skype or a land line, but I will need to make a ton of calls and don't want to be trapped in my room.

Any suggestions?

If so, any specific shop to go to near my hotel?