Xl dialing code
The answer for future reference is 01000 + (1) for USA then the USA number you are calling. If it has a (1) like 1 -800-XXX-XXXX you dial the extra (1) in this case.
Going up to a local cell shop assumes they speak English and you speak Indonesian - good luck - thanks for the suggestion LOL.
I found the answer by Google. Sorry to trouble to group. I thought it was an easy question.
Bye
Arlo in Ubud