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[email protected] It will fully support using other operating systems including users making their own builds of GrapheneOS. It's part of our hardware requirements. We'll likely be able to make hardened builds of firmware and drivers which can be released in an official way for easy builds without needing to extract anything from the GrapheneOS or Motorola OS factory images.
The apps that enable tap-for-payment ask your bank for permission and some security details to activate using cards for NFC.
In North America, banks won’t give that permission/security info to any android app but google pay, and only if the play store verification thing says the OS is fully secure - and google pretends grapheneos doesn’t hit those security metrics.
So yes, NFC is how tap-for-payment works, but unless NA banks implement it themselves, or trust a 3rd party that isn’t google to implement it, grapheneos phones are blocked from using the tap-for-payment functionality.
That’s… Fucking stupid. But it’s to be expected from greedy, overly powerful tech corporations I suppose.