Latest Samsung Galaxy J3 2016 (SM-J320W8) - PMB firmware
Samsung Galaxy J3 2016 (SM-J320W8) firmware for Unknown (PMB): 2 builds in the SamMobile archive, newest first. The latest is J320W8VLU2AQG4 (Android 6.0.1, built 27 July 2017). Open a build to download it, or switch region with the country selector.