If you have a late-2018 or newer unit with an un-unlockable bootloader, custom ROMs are not possible (unless using paid, unofficial exploits – which we do not recommend).
dd if=/dev/zero of=/dev/block/bootdevice/by-name/misc bs=256 count=1 Or flash the vbmeta_disabled.img via fastboot:
Historically, Huawei provided unlock codes for bootloaders. However, since mid-2018, Huawei stopped issuing these codes. The NMO-L31 sits right on the cusp of this change. Some early units can be unlocked; later units cannot.
The running an updated custom ROM like LineageOS 20 or crDroid 13 is a completely different device compared to the abandoned EMUI 8/9. You get modern Android features, critical security patches from 2023 (not 2019), and a smooth, bloat-free interface.
However, be realistic. This is a 5-year-old tablet with 3GB of RAM. It will never run heavy games or 4K video smoothly. But for reading, browsing, media streaming, and note-taking, an updated custom ROM transforms it from e-waste to a perfectly capable daily companion.
This leaves users with aging security patches, sluggish performance, and incompatibility with modern apps. The solution? A . By flashing an updated custom ROM, you can breathe new life into your NMO-L31, offering a newer Android version, improved speed, enhanced privacy, and modern features.
