Windows phone models aren't that many, which makes sense as the platforms has a market share of less than 2%. You might even say they are a select group of phones, each designed to occupy a niche of its own. So the Acer Liquid Jade Primo is a specimen of a rare breed.
Source: http://www.gsmarena.com/lg_g5_vs_samsung_galaxy_s7_low_light-review-1420.php