Huawei wasn't the first maker to use a dual-camera setup with the P9, but that's what became the spark of the multiple-camera revolution. The P10 series lost some of that momentum by focusing on experience instead of features, but with the P20 Huawei is back leading the camera race.
Source: https://www.gsmarena.com/huawei_p20_p20_pro_hands_on-review-1741.php
