He encontrado este hilo de xda que dice como forzar la ota. A mí me ha funcionado, también dicen que es peligrosa, así que no sé, a vuestra elección Hii there,
I was struggling to get the January Update for A1 so I looked upon many threads to find methods and devised a step by step process to force OTA updates.
1. Go to Settings > Apps and Notifications > App Info > 3 dot menu Icon > Show System
2. Look for Google Services Framework App.
3. Open it and go to Storage > Clear Data.
4. Push back button once > Disable the app, force stop it then Enable again.
5. Reboot your device ( Important !)
6. Go to Settings > System Update > Hit check for updates (10- 15 times).
7. Update will pop up. Enjoy.
EDIT : If update doesn't popup wait 5-10 Mins.
Link:
https://forum.xda-developers.com/mi-...dates-t3735724