My Nokia N900 ran Linux back in the day, and was a more polished experience than the iPhone it was then contemporary with. Too bad that particular line went precisely nowhere.
Not officially, from what I recall. That was possibly one of the plans for it’s alleged successor, the N950, which turned out to be vaporware. Sailfish OS then went to be used on the first Jolla Phone, which probably sold in single digit numbers. Jolla now manufactures nothing, although they apparently continue to develop Sailfish for licensing to embedded applications, and their main deal seems to be the “Appsupport” compatibility layer for Android apps to run on Linux.