Important Note Before You Start

The Huawei Y9 Prime (2019) was not officially included in Huawei’s global EMUI 12 rollout list. Most devices remain on EMUI 10 or EMUI 10.1.

If you are not comfortable with ADB, Fastboot, and command lines—STOP. Do not proceed.

The update introduces a redesigned user interface and improved connectivity features:

Huawei does not typically provide standalone "download links" for system firmware. Instead, updates are delivered through official over-the-air (OTA) channels to ensure system stability and security. Method 1: Using System Settings (OTA)

Do not turn off the device during the installation process (30-40 minutes).

For 99% of users:

Stick with EMUI 10. Disable animations in Developer Options, and your phone will feel fast enough. If you want a new look, download a third-party launcher like Nova Launcher or Microsoft Launcher.

Kirin 710F with 4GB RAM. Capable of handling PUBG and Mobile Legends at stable framerates, though it shows age in heavy multitasking.

Flexible Fonts: Support for adjusting font weight and size via a slider. Important Pre-Update Notes Update Your Phone System Online | HUAWEI Support Global