I bank with a thai bank, app was setup on a uk mobile, when I was in Thailand and thai sim card, I was borrowing my wife's sim card,
Currently in uk taken out the thai sim card on a uk sim, the app works perfectly,
Test
Just went to my second phone and tried to install the app, in the uk
The app comes up that you need to turn off the wifi and use 3G/4G/5G
before proceeding
I didn't go further