Realme has started rolling out September 2021 security patch to Realme C15 devices in the month of October 2021, carrying a build number of C.08 and basic stability improvements.
Realme C15 was released on July 28,2020 with Android 10 out-of the box.
This update comes with minor changes and an integrated September 2021 Security patch. Realme C15 got android 11 with Realme UI 2.0 update in July 2021.


Source>>Realme Community
| Android OS | Update | Release Date/Status | Estimated Months |
| Android 10 | Out-of-the-box | July 2020 | Nil |
| Android 11 | First OS update | July 2021 | 12 months |
| Android 12 | Second/Last OS update | Eligible | Unconfirmed |
The Realme C15 was released with an Android 10 in July 2020. Therefore, Android 11 is 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. However, it is still unconfirmed.
Check out >>> Android 12 update list for Realme devices
The Realme C15 Android 11 Update with stable Realme UI 2.0 has been released with the September 2021 security patch.
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 update.
Once again, this is a phased rollout and will be available to all the users very soon. Kindly be patient and wait for the update on your device.
The manual update link will be available on the website → https://www.realme.com/in/support/software-update
For more android updates please download our android app – available on the Play Store