What are you talking about? There are hundreds of different cell phones available for sale in the US.

Hundreds might be pushing it.

If you as a user want a modern, high end or top of the line cell phone, you're pretty much just stuck with Apple or Samsung. Maybe Google. If you remove the minor variants each has that's just 3.

We used to have many more - OnePlus obviously, Honor, Huawei, LeEco, HTC, LG, ASUS, Essential, Blackberry, etc.