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Most phones nowadays support NFC so this shouldn't be an issue. Just use your NFC key to log into the phone. Alternatively you can also use a Bluetooth U2F key instead of a NFC key. Both of those keys have a regular USB port in addition to NFC/Bluetooth so you can set them up on your laptop and then use them with your phone.

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On my Pixel 2 you can (though not conveniently) plug a typical USB-A Security Key into the USB-C port via an adaptor and of course it just works.

I enrolled a key this way (USB-A key plugged into an adaptor on the USB-C port) once just to see if it works. Bizarrely Google will let you do that, but, having proved that it works, they then immediately tell you that you need to install Desktop Chrome before you can enroll any other keys. No idea why they think that's a good idea let alone necessary.

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