This is an iteration of the Redmi Note 9 Pro Max MIUI 12.5 ROMs. The first MIUI 12.5 firmware or update for Redmi Note 9 Pro Max has already been released on 2021-09-09 by Xiaomi. You can now download the stable, weekly, or beta MIUI 12.5 ROM for your phone/tablet with device code excalibur. The last version of Redmi Note 9 Pro Max MIUI 12.5 ROM has been rolled out on 2022-04-14. It is recommended to update to the latest MIUI12.5 to experience the new features. If you want to upgrade or downgrade your MIUI version, you can find more details on the Redmi Note 9 Pro Max ROM section page.