[tormeh]

What's this person's phone OS? This seems somewhat overlooked here. To me, the mobile OS is the centerpiece of any ecosystem. That leaves only two options.

[saubeidl]

Strictly speaking, that's not quite true. There's non big-tech Android distros like Graphene and /e/.

[Gander5739]

Those are both AOSP-based.

[7moritz7]

HarmonyOS Next (Huawei) is independent from Android. So that leaves three options, even if Harmony is mostly China focussed. They have tons of users there.

[tapete1]

To me, it is the most unimportant one. I don't even read email on my phone. The screen is way too small to do anything useful.