OnePlus continues to improve the OnePlus 9 and 9 Pro as it has released the OxygenOS 11.2.5.5 update for both smartphones. The new firmware bumps up the Android security patch level on the OnePlus 9 duo to May 2021 and improves the HDR effect and white balance performance on the pair's cameras. Additionally, the new update improves the charging performance while also squashing known bugs. You can check out the update's changelog below to learn more about it. OxygenOS 11.2.5.5 update OnePlus hasn't made an official announcement of the update's rollout at the time of writing...
Source: https://www.gsmarena.com/oneplus_9_9_pro_oxygenos_11_2_5_5_update-news-49020.php
