Just a heads up. Since Citibank sold, we can not open New Citibank Plus account but for existing customers the debit card will work as usual in Vietnam, it is now branded as UOB. There are atm at airport and Sinwah Building 115 Nguyen Hue Street HCMC (SGN). These have max 8M per withdrawal no ATM vendors fees so you can withdraw multiple times without any issues.
Last tested 03/07/2023
There are also citibank branded ATMs on pham nhu lao st near de tham street (a block over from walking street) in Saigon and at the Pullman Hotel in Hanoi.
Both are fee free and 8mill withdrawal limits.