Realme 1 was the first phone from realme in India and they have been providing an update to after 2 years of launch.
UI Version: CPH1861EX_11_C.49
● Android security patch: May 2020
● Fixed some known bugs, and improved system stability
Note: In order to ensure the stability of this update, it will have a staged rollout. 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. If no critical bugs are found, the full rollout will be completed in the upcoming days.
So realme 1 users go to setringa> software updates>check for update>if available then click on update now and enjoy the latest OTA update.