Lots of people are unable to find the update for Mi Wifi 3c Router 2.8.51.
Xiaomi have removed the link from web site and also stopped selling product in India now.
But any ways here is link for the same
https://drive.google.com/file/d/14QTY4meNizqMlaJtOaGexNUaZpRE7v4x/view?usp=sharing
Thanks and subscribe me on Youtube
https://www.youtube.com/channel/UCJTCc40c1u8CgSXFrJTMmdQ?view_as=subscriber