Unlike the old railroad companies that needed huge capital investments to set up national railroad networks, anyone with a couple million could cobble together

Unlike the old railroad companies that needed huge capital investments to set up national railroad networks, anyone with a couple million could cobble together a PoC of some phones. So being the biggest phone seller doesn't turn them into some untouchably large company. There's a ton of companies trying to release their own phones; even Ubuntu has their own line[1]. The only industry in all of computing where antitrust seems to me to be directly applicable to a business - only considering itself - is owning and running fabrication plants. I think they cost something like $1 billion to set up. Maybe Comcast or AT&T or similar could also count with their expensive communications infrastructure, and if we didn't otherwise have regulation for those industries. Of course, Apple colluding with Google to fix the store cut would also count, as would many other similar examples. But those involve multiple companies conspiring together, not a single one like you've mentioned. [1] http://www.ubuntu.com/phone/devices http://www.ubuntu.com/phone/devices