Xiaomi Magenta 5G AX5400 (CB0401)

For Developers
21

Oh! Is there some connection to OpenWRT as some references claim?

And is it then possible, the bootloader is also not from Android?

22

yes. It’s fork of OpenWrt v18

I don't know where to get the bootloader image. You'll have to provide it.

The FIT-kernel image contains many dtb images:

  • fdt@mp02.1 = IPQ5018/AP-MP02.1
  • fdt@mp03.1-c2 = IPQ5018/AP-MP03.1-C2
  • …
  • fdt@mp03.3-c3 = IPQ5018/AP-MP03.3-C3

You need to find out what configuration is used on your device revision.

23

when I googled CB0401 yesterday, I also found references to a CB0401v2.

24

I know

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25

I suppose I don’t for the primary goal which is to make it boot properly. I hope it only takes flashing the original FW.

Making clean OpenWRT for it a bit different ballgame.

And it is the CB0401. Not V2.

26

Some people have managed to root these devices:

Some even dumped the images, but posted them only for a select few:

https://www.right.com.cn/FORUM/thread-8451018-1-1.html

27

Can I somehow detect what kind of network traffic this device makes while booting?

I would like to know if it does try to reach a tftp server.

28

Someone has already been to the same issue as I am. UART seems to be where I expected it to be:

Unfortunately no information if it is 1,8V or 3,3V, but I think It’s expected to be 3,3V.

1 Like
29

I got 1,8V USB TTL -adapter now and tested it.

There is only the “SBL-like” output. When it is supposed to output U-boot printout, it’s blank.