According to Huawei’s official update roadmap and extensive user reports from forums such as XDA Developers and Huawei Central, the Huawei Y9 Prime 2019 (model numbers typically JKM-LX1, JKM-LX2, JKM-LX3) never received an official, over-the-air (OTA) update to EMUI 12. The device’s update cycle effectively ended with EMUI 10.1, which was based on Android 10. Huawei’s policy for mid-range devices from 2019 generally included two major Android version upgrades, and the Y9 Prime 2019 received those (Android 9 → Android 10). EMUI 12, despite being a user interface overhaul, was reserved for newer devices or higher-tier models from the same period, such as the Huawei P30 series or Mate 20 series.
: Navigate to Settings > System & updates > Software update and tap Check for Updates .