How to Flash Custom ROM on Samsung Galaxy J7 Pro Android 9 Pie PrometheusOneUI V1.0. This J7 Pro Custom ROM is a full Samsung OneUI port with Android 9 Pie. Prometheus OneUI Rom For Galaxy J5 Pro / J7 Pro 2017 ONLY FOR J530X/J730X. It works for SM-J730X ( SM-J730G and SM-J730F. To install • Read More »