[pmontra]

You have to wait one day only once, when enabling the feature. I agree that enabling developer mode could be a problem but mostly because it's buried below screens and multiple touches. As a data point, I enabled developer mode on all my devices since 2011 and no banking app complained about it. But it could depend by the different banking systems of our countries.

[frays]

You don't use the HSBC or Citibank app then I assume?

[pmontra]

They don't operate in my county AFAIK. However that reinforces my idea that the endgame will be a pristine Android phone in a drawer at home with the banking apps required for accessing their sites with 2FA and another phone in my pocket for daily use.

[brewdad]

I’m not sure that Google/Android selling everyone two phones instead of one is the deterrent to this behavior that you envision.

[pmontra]

It's not a deterrent, far from that, but it's probably what I'll have to do to be able to carry with me a sane device.