The previously leaked Android One version of the Moto X4 has been made official by Google and Motorola today. It's the first Android One device that will be sold in the United States. You'll be able to purchase it from Fi, Google's carrier, for $399. Under the hood this is identical to the already unveiled Moto X4, coming with a 5.2-inch 1080p display, Qualcomm Snapdragon 630 chipset, 3GB of RAM, 32GB of expandable storage, and a 3,000 mAh battery. On the rear there's a 12 MP + 8 MP dual camera setup, while selfies are snapped by a 16 MP shooter. The Moto X4 is IP68 rated for water...
Source: http://www.gsmarena.com/moto_x4_android_one_smartphone_becomes_official_for_fi_priced_at_399-news-27378.php