I think it will be helpful if we can use other phone devices to test the cable (or the phone itself with a different cable), otherwise, we're just guessing blindly. I guess the cable is fine since you can use it with your computer perfectly.
Compatibility issus. If that's the case, like I said earlier, the problem's from the version of Android.
Which version of Android causes this issue exactly? If it's well-documented, maybe we'll see more cases.
In *theory* from what I see once OTG is turned on the phone should be providing power to the trezor. At that point the trezor should turn on, even if there is an issue with the communications between it and the phone there should be something on the screen.
This is where it becomes the head scratching issue. Phone not providing power? Phone not providing enough power? Trezor a little out of spec and even with the phone providing power it is not enough to turn it on for some reason. etc. @OmegaStarScream did you reach out to Trezor / look through their forums
https://forum.trezor.io/With mine even plugged into a regular wall AC adapter it powers up with a cable with the data lines cut, which is why I am making the assumption that is how they all work.
-Dave
