> They are using their market power over Android to prevent OEMs from selling other mobile OSs.

That... is pretty spun, especially with regard to the Microsoft comparison upthread to which I responded.

They aren't trying to restrict "other mobile OSs", they're specifically saying GrapheneOS, and in general any AOSP-derived system which is designed to interoperate with the GMS frameworks.

Like, even AOSP alone would be fine, c.f. Fire or Harmony which never got this attention. GrapheneOS is specifically in violation because it includes a feature to suck down and essentially "pirate" an unlicensed copy of the GMS suite, thus making the phone into the practical equivalent of a Pixel.

That is what Google objects to, because they sell GMS as a product and aren't interested in their downstream OEMs "giving it away" for free by bundling a third party product that doesn't license it.

Basically GrapheneOS, as it exists right now, just can't be shipped as a commercial product. There's no license for the magic stuff they claim to support.