Samsung Galaxy J7 2016 (SM-J7109) firmware for China (China Telecom) (CTC): 2 builds in the SamMobile archive, newest first. The latest is J7109KEU1BRD1 (Android 6.0.1, built 24 April 2018). Open a build to download it, or switch region with the country selector.
We recommend using Samsung’s own utilities, Samsung Smart Switch and OTA (Over-the-air), to upgrade devices. Use SamMobile only if you are 100% sure about the risks involved in flashing
your device. SamMobile is not responsible for any damage caused by using the files on this website.