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It does work via the official Trezor wallet with a Chromium-based browser on Android. Someone also did develop an initial Bitcoin wallet app for Trezor, which works:
github.com/MattSkala/trez
If there's interest, it could serve as a starting point for further development work.
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As I said, the first party wallet works on Android, just as it does on the desktop. It works in any Chromium-based browser including Chrome. They don't have an official native desktop app so it's not like it's a worse experience on mobile. It's the same official web app for both.
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The official wallet uses WebUSB which is what makes it portable. It works on Android because Chromium-based browsers support WebUSB. Once Safari on iOS supports WebUSB, it will work. See caniuse.com/#feat=webusb. I don't know if there's an alternative wallet supporting it on iOS.