If you've seen my posting history you will have seen I've flagged up some of these previously.
Also to clarify a few things:
- HKT, csl and 1010 are all the same thing. So they have HSBC / Hang Seng, Bocomm and Tap&go. Also the only credit card that presently works with Tap&go is Dah Sing.
- 3citiwallet. This launched a few years ago. I cannot find any information on this service anymore, anywhere. Not on the Three HK website, not on the Citi website and I can't seem to find an app with it.
- I didn't know about BOC and BEA, thanks for pointing those out.
All of these tie you down to a specific provider / credit card company. Also the carrier ones require you to have a specific sim in your phone. The idea with Android and Apple pay is they are both carrier and (hopefully) credit card provider agnostic.