Not disagreeing, but answering the question of are all phones ARM: no, there Intel too. Source: had to add Intel build support for our Android SKUs to run on said phones. Some Unity stats from about 6 months ago indicated:
ARMv7: 98.1%
Intel x86: 1.7%
I think a lot of the Intel stuff has been discontinued, not sure what is actively being developed outside of ARM right now.
This is strange. Maybe like a Windows phone? Where does it get those device metrics? < 2% makes me think it might just be that Androidx86 emulator project.
I have an Asus Zenfone 2, complete with its "Intel Inside" logo. Not particularly special but when I bought it met the critera of "gorilla glass + pokemon go for below $150". Nice case too.
(and there were a lot of small brands that used to make them, that I don't believe get represented in that list)
Having said that, for it to reach >1%, it was more likely a combination of Intel Android tablets (which were fairly common for a while) and Chromebooks.