@Miedzio Poleciała aktualizacja (nowa kompilacja), mam nadzieję że o niczym nie zapomniałem i będzie działać.

Apologies for the Google Translate from English, I hope it makes sense!

Dziękuję @IceG za najnowszą wersję. Mam go teraz na moim MF286D od Nordic B012. Miałem pewien problem z sysupgrade.
Wszystko było w porządku przy początkowym TFTP, ale kiedy próbuję uruchomić Sysupgrade, na wyjściu konsoli pojawia się wiele linii z komunikatem „Nand Flash Error. Status = 12336”.
Po ponownym uruchomieniu systemu następuje powrót do trybu u-boot.

Domyślam się, że coś się zmieniło w układzie flasha przy aktualizacji oprogramowania Nordic do B012.

Uruchomiłem to polecenie w konsoli uboot, aby wyczyścić pamięć NAND w ZTE:

nand erase 0x1800000 0x1d00000

Następnie uruchomił się Sysupgrade i teraz znów mam działający OpenWRT.

Czy powinienem zrobić coś więcej niż „nand Erase”, czy to wszystko, czego potrzeba?

Przychodzi mi na myśl także kilka dodatkowych pytań: czy powinienem używać pliku initramsfs*.itb dołączonego do wersji IceG Openwrt, czy też ogólnego pliku initramfs*.itg OpenWRT można używać przed sysupgrade?
Jaka jest różnica pomiędzy standardową wersją initramfs*.itg a wersją IceG?

Thank you to @IceG for the latest build. I now have it on my MF286D from Nordic B012. I did have some problem with the sysupgrade.
All was OK with the initial TFTP but when I try to Sysupgrade I get lots of lines on the console output with " Nand Flash error. Status = 12336"
When the system reboots, it goes back to u-boot.

I'm guessing that something has changed with the flash layout when updating the Nordic firmware to B012.

I ran this command in uboot console to erase the NAND memory on the ZTE:

nand erase 0x1800000 0x1d00000

Sysupgrade then ran and I now have a working OpenWRT again.

Should I do more than the 'nand erase', or is that all that is needed?

Also a couple of extra questions come to mind , should I use the initramsfs*.itb that comes with the IceG version of Openwrt or is the generic OpenWRT initramfs*.itg file Ok to use before sysupgrade?
What is the difference between the stock initramfs*.itg & the IceG version?

Thank you, that is what I thought, I just wondered why the 'IceG'  initramfs file is different from stock.

Hello, I have the device with Nordic firmware at the moment and I would like to use it from another machine: which tools should I use for modem mode and bridge mode from openwrt or even regular linux?

Thanks!

Just to make sure we're on the same page, I have Nordic and I would like to set it in bridge mode and use it from a different machine that runs openwrt or debian.

To be honest, I'm not completely sure how, especially for modem mode.
Do I need wwdial or pppd on the other end?

Ok, will try. How about modem mode? Will I need to load some special kernel module to have the modem exposed as local device?

I get it now, thanks.

Hello guys, I wanted to know some information. I have an issue with my ZTE MF286D router with OpenWRT, and I want to revert to Nordic B12. I've tried using the kmod-mtd-rw package, setting it to 1, and I've already overwritten the partitions once. Now, mtd4.bin is mtd11.bin, and I'm getting an erase error. It won't let me overwrite these two partitions. I have the Nordic dump files downloaded and want to overwrite them from Nordic. I wanted to know the command for mtd4 and 11:

mtd4
nand erase..........
And
nand write..........

mtd11.bin
nand erase........
nand write.......
What are the hex values to be entered?

Yes I know I can do it from the serial. But to overwrite, is it enough to delete with the 'nand erase' command mentioned above?"

Hello guys, I have a serious issue with my OpenWRT. I bought this router with a damaged partition, the FOTA MTD11. It shows these errors, and I've tried to rewrite it from U-Boot, but it says there is not enough space to load it even from U-Boot. I attempted to use the kmod-mtd-rw package, but the result remains the same. The error is shown in the attached photo.

Moreover, the framework is not functioning anymore. I purchased it in this condition from the previous owner, and I wanted to fix it.

I am eagerly awaiting responses from someone more experienced who can guide me in the best possible way. Thank you very much. You can find the image with the error details on my Google Drive here ---> https://ibb.co/JFnGkGZ.

If I can't upload the photo, just let me know. I wanted to show you the serious problem

"The issue I'm facing is that the reset button on Nordic is not working; the indicator lights remain blue without performing a reset. Additionally, upon the first boot, the web interface loads the webpage, I enter the password, and then the entire graphical interface of Nordic stops working. If I refresh the web page, the web interface is no longer loaded. However, the ping remains stable; it never drops. When using the framework method, it often freezes at root_image, but providing an IP seems to work. Yet, the graphical interface consistently crashes with any version of Tim, Nordic, or Elisa." this is example https://ibb.co/cNyYL14