SamyGO

And it works, booting is fine.

https://imgur.com/a/cRk5mgq

Here are the old and new nand flash. New one installed fine by phone repair shop. Cost: 55$ but I did this for the experience.

So ebay listing from above is legit.

Edit: Dam it, new page.

Yes, realy good listing. They sell even preprogrammed micom chips for those users with micom software upgrde failure.