When rep responded to AJK, he did not seem so sure, and also didn't answer the question that was asked until he was forced to, and sounds like he just guessed. I'm 99 percent it would be fine -especially after the DP that it shows as active- but it's a lot of money to gamble with.
Off topic, but when you go out of the USA, you can dial from Hangouts Dialer app when using the mobile data, and will be charged as if you were calling from the USA, so whatever the regular GV rate is plus the data consumed, which is .6 to 1 MB perminute, so about 1cent per minute in addition to the GV/FI rate. Otherwise, it's at least 20 cents per minute for calls from outside the US.