The perks of living in the States as a Vietnam is that I get to see the differences between the two countries in several aspects. One of them is payments. If contactless and tap-to-pay is more common and popular in the US, QR Codes are much more ubiquitous in Vietnam, at least in the big cities. What you see below is in Ho Chi Minh City, the biggest economic hub in Vietnam. When you venture out to smaller and poorer provinces, things may change significantly.
This is how we paid at a convenience store. The cashier scanned the QR code on a phone to process payments.
In the below clip, we were at a local bakery named Tous Les Jours. You can see different QR Codes for different mobile wallets. Consumers can just scan one and make payments. The nature of the transaction requires immediate confirmation since nobody is going to wait 5′ for a payment to go through.
Even mom-and-pop stores like a sugar cane shop and a photocopy shop below allow payments via QR Codes
Mobile wallets like Momo strive to acquire and retain users. When we paid for our drinks at the sugar cane shop, we got 50% discount out of nowhere even though the transaction amount was only $1.2.