I don't know for QR codes, but swish payments (pay things on phone) are very popular in Sweden. I can swish my local fruit seller, the bar tenders and my friend

I don't know for QR codes, but swish payments (pay things on phone) are very popular in Sweden. I can swish my local fruit seller, the bar tenders and my friends in a matter of seconds. As far as I know Sweden is generally more advanced in this kind of technologies than what I see in Hong-Kong.