Realme released September 2021 security patch for the Realme C25s smartphone. It is a mid-range mobile from the Realme brand released on 2021, June 09th with android 11, Realme UI 2.0.
The update will be randomly pushed out to a limited number of users today and will have a broader rollout in a few days after making sure there are no critical bugs.

Source>> Realme community
Note:
The manual update link will be available on the website → https://www.realme.com/in/support/software-update
| Android OS | update | Released date/status |
| Android 11 | Out-of-the-box | June 2021 |
| Android 12 | First OS update | Eligible/unconfirmed |
| Android 13 | second Os update | - |
Till now there no Major OS update release for Realme C25s. It is released with android 11 in May 2021, so its first OS update will be Android 12 which is not yet confirmed.
Hence, it is Eligible for the upcoming Android 12 update as well. And it will probably be its last major OS update.
The Realme C25s security patch with stable Realme UI 2.0 has been released in batches. A wider rollout to all the users is expected
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.
For more Realme Android updates please download our android app – available on the Play Store