Originally Posted by JenniDahling

Actually we have 10 digits (area code) plus a 7 digit phone number, unless you are calling from a foreign number then its +1 then the area code and number. Calling overseas numbers from the US need to be dialed with a + or a 011 then country code and 6 digit number.

Believe me, its confusing to Americans who haven't traveled abroad, either because they can't figure out how to do the + sign on their phone (hold down 0 til it changes) unless you have a smart phone where you have the option of the + sign.

Way better to keep it simple and get a US number that folks at the show can reach you at. If they are from US/Can its way cheaper and easier to communicate at the show. Like Sarah said, you can keep the phone until the next show then load up some credits when you need it next.