[MENTION=155883]invisible[/MENTION], thank you for that thoughtful, detailed explanation of how to add a credit card from the US. It worked! First, I denied it location access. Then I set a hotel location in Ho Chi Minh. Then I tried adding a Chase card. And it was added. I was really glad I didn't have to go thru calling the credit card company and follow your further instructions. Now I am comfortable that I will be able to use GRAB in Vietnam. You are a star.