@PH Ph Ask Goole AI mode... I haven't played with 4G CPE routers.

@Nick A hi brow, I'm using the image shown on page 2. The one you showed to another user with the same motherboard ik316-emcp_v1.0. https://github.com/NickAlilovic/build/releases/download/20250306/Armbian-unofficial_25.05.0-trunk_X96q-lpddr3-v1-3_bookworm_edge_6.12.11_xfce_desktop.img.xz The only difference I noticed is the emcp IC; in my version it's a Kingston. Here are some new photos. I really believe the eMMC block is damaged, but the RAM is still working. Or it has a cold solder joint. That's why it's not detected in Armbian, and it's not possible to install the stock firmware directly. If you have/or want or would like to run any tests, I am available. Thank you in advance for your support. I'll use it from the SD card. I'll just try to fix the acceleration issue. But for my purpose, it already works well as it is. Purpose: Remote access behind a dual CGNAT, to control a 4G CPE, a router, and an NVR in a rural area. The NVR has normal access if connected to the cloud service, but I prefer not to use it. The router and CPE are not accessible, and the IPv6 address changes constantly. Thank you again.

So far, the best working images I have found for the LonganPi 3H are those developed for the BananaPi M4 Zero. Only issues I have encountered are wifi-related. Hopefully this helps someone.

Thank you, everyone, for the suggestions. After having been absent here for a while, I am going to try Dante's suggestion first. Thanks again!

@PH Ph You didn't tell us which image you used? Your dts shows axp1530. Which is also known as axp313a. https://linux-sunxi.org/AXP_PMICs pmu { compatible = "x-powers,axp1530";