Huawei started rolling out EMUI 10 – its custom Android interface based on Android 10 – in November last year. EMIU 10 refined the user experience and brought improved visual elements including several new screens for the always-on display (AOD). While EMUI 10 added a bunch of new and colorful AOD options for Huawei and Honor phones with AMOLED displays, you can also install custom AOD wallpapers using any PNG image of your choice if you have already received the EMUI 10.1 update.

XDA Member Kamcho84 recently discussed the method to install custom AOD wallpapers on any Huawei phone running at least EMUI 10.1 or an Honor device Magic UI 3.1. Although obvious, it's worth mentioning that this method will only work on devices equipped with OLED/AMOLED displays and support always-on displays already.

XDA Senior Member SilviuO compiled a guide on how to install custom AOD wallpapers on EMUI 10.1 devices in an XDA Forums thread. For the method to work, you'll be required to install the Huawei Themes app from App Gallery. If your device uses the HMS Core instead of GMS Core, the app must be pre-installed.

XDA Forums thread: EMUI 10.1 AOD THEMES - PNG's & HOW To change pictures 

To set a custom AOD wallpaper, you'll be required to install a custom theme and apply it with the Themes app. You can either chose one of the many themes created by SilviuO or create your own using a PNG image with a black background of your own choice. If you choose to do the latter, the Senior Member has listed out the steps you'll be required to follow to create and apply custom themes.

You can expect the method to work on the Huawei P40/P40 Pro/P40 Pro+ as well as the Huawei P30 series as these devices have received the EMUI 10.1 update already. Meanwhile, EMUI 10.1 beta is already being tested for Mate 30 series devices and the stable version is expected to roll out this month. As per the update timeline for the global update released by Huawei earlier this month, the update will be available for a total of 14 Huawei and 4 Honor devices aside from the ones that have already received the stable update.