If you missed that window, your tablet likely remains locked to HarmonyOS/EMUI. No 2021 custom ROM works without this step.
As of mid-2021, developing and installing custom ROMs (such as LineageOS, Pixel Experience, or AOSP) on the Huawei MatePad 10.4 is exceptionally difficult, bordering on impossible for the average user.
Huawei stopped providing official bootloader unlock codes years ago, so you will need a community tool.
In summary, if you were searching for "huawei matepad 104 custom rom 2021," the landscape was (and remains) largely a dead end. The combination of a locked bootloader and a lack of dedicated development has severely limited the options for this tablet.
| Metric | Stock HarmonyOS 2.0 | LineageOS 17.1 (GSI) | |----------------------|---------------------|-----------------------| | | 640 | 635 | | Geekbench 5 (Multi) | 2450 | 2440 | | Storage Read | 780 MB/s | 810 MB/s | | RAM Management | Aggressive (kills background) | Standard (better for multitasking) | | Google Play Battery Drain | 2% / hr (idle) | 4% / hr (idle due to broken deep sleep) | huawei matepad 104 custom rom 2021
On your PC, browse XDA Developers or other developer forums for a GSI for your device's chipset. The HiSilicon Kirin 820 is an ARM64 device. Your two main options are:
Before diving into software, let’s recall the hardware that made the MatePad 10.4 so appealing for hacking:
At night, Liao and his daughter, Mei, built worlds on it. She navigated with the impatience of a child and the assurance of someone who believes any tool can be made to do extraordinary things. Liao found himself installing small utilities NebulaForge had bundled: a handwriting overlay for Mei’s practice, an app that slowly rotated photo collages of family friends, a lightweight note-taking app that synced across devices through a protocol he trusted because he controlled it.
The room was quiet, save for the hum of his desktop fan If you missed that window, your tablet likely
Since flashing a new ROM is likely blocked, most 2021 MatePad users turn to "GMS workarounds" or alternative app ecosystems to get the Google experience.
Assuming you have an unlocked bootloader and Fastboot access.
: Without an unlocked bootloader, you cannot flash custom recoveries like TWRP or install third-party operating systems such as LineageOS. Current Software Landscape for MatePad 10.4 (2021) Instead of custom ROMs, development for the MatePad 10.4
For the vast majority of users, the most stable path to an optimized tablet experience is to embrace sandboxing utilities like GSpace for your missing apps, debloat the software via ADB, and use a custom launcher to override the stock visual style. If you want to optimize your current tablet setup, tell me: | Metric | Stock HarmonyOS 2
: Standard exploits used on older Huawei devices (such as the PotatoNV tool for older Kirin chipsets) do not support the Kirin 810 or Qualcomm Snapdragon processors found in the 2021 MatePad models.
Installing a custom ROM on a Huawei MatePad 10.4 (2021) is currently impossible
The Huawei MatePad 10.4 (2021) is a powerful tablet, but its lack of Google Mobile Services (GMS) often leads users to explore custom ROMs. However, as of 2021 and beyond, installing a custom ROM on this specific device is extremely difficult due to Huawei's strict bootloader policies.