Before downloading firmware, confirm your device model to avoid "bricking" (software failure). Update Your Phone System Online | HUAWEI Support Global
The firmware is the essential software that controls the device's hardware, managing everything from its unique pop-up camera to the Kirin 710F chipset performance. Maintaining the latest firmware ensures system security, better battery management, and access to new EMUI features. Huawei Y9 Prime 2019 Specifications Overview