The latest data from Canalys shows that the North American smartphone market declined 19 percent for the last quarter compared to the same period in 2018. Apple went backwards in terms of both sales and market share but continues to dominate the North American market while Samsung actually sold more smartphones despite the downturn.
https://www.notebookcheck.net/North-American-smartphone-market-dipped-by-19-percent-last-quarter.420464.0.html