How to pay by card in Nha Trang and what to do if the terminal says wrong PIN or rejects the card?

QR-code payment: in September 2026 a traveler spent about an hour trying to make a purchase in an app and got as far as QR-code payment, but none of his home banks' apps could read the code. In the end he bought it through the Trip.com app.

The 'incorrect PIN' error: on arrival in late July 2026, terminals kept telling a traveler his PIN was wrong, although he entered it correctly and had checked it before the trip. After he changed the PIN in his bank's app, everything worked properly.

Where a card did not help: at the café 'O, pelmeshki' a traveler was told in July 2026 that payment was by code or cash only. She had only a card; she tried 5–7 times to pay by code through an app, without success. A small cash reserve helps at places that do not take cards.

In late July 2026 a traveler who paid by card throughout her holiday described how it works: you need to insert the card into the terminal rather than tap it, then enter the PIN, and sometimes you are also asked to sign. That same day she bought fast passes for Vinpearl twice through the app.