Realme releases an OTA update for Realme 6i on the month of December 2021, this is just a software update that fixes a few bugs in the system, previously it was running on November 2021 Security Patch with C.15 Build. This update brings the RMX2001_11.C.16 Build number with an update size of 86.16 MB.
Its sibling Realme 6 is also getting the update along with this device, more info here Realme 6: December 2021 OTA Update with C.16 Build as usual it only brings optimization in system & stability.
Realme 6i was released on 29th march,2020 with Android 10 out-of-the box.
Previous update: Realme 6i November 2021 OTA Update with C.15 Build

Source: Realme Community
| Android OS | Update | Release Date/Status | Estimated Months |
| Android 10 | Out-of-the-box | March 2020 | Nil |
| Android 11 | First OS update | September 2021 | 11 Months |
| Android 12 | Second/Last OS update | Eligible | Unconfirmed |
The Realme 6i was released with an Android 10 in March 2020. Therefore, Android 11 will be its first major OS update.
Hence, it is eligible for the upcoming Android 12 update and it will be its second/last major OS update.
Check out >>> Android 12 update list for Realme devices
Once the update is available on your device, you can head over to Settings >> About Phone >> Software Update section to update your Realme device with the latest Beta update.
For more Realme Android updates please download our Android App – Available on the Play Store