The May 2021 security update is arriving a lot sooner than expected for the OnePlus 9 series phones.
OnePlus has released a new OxygenOS update for the OnePlus 9 and 9 Pro phones. The OxygenOS 11.2.5.5 update includes the latest May 2021 Android security patch. It also contains camera improvements and a few other tweaks.
OnePlus’ latest flagship phones have started receiving a new software update, which brings the May 2021 Android security patch and some other improvements. While the company is yet to officially confirm that, a thread on OnePlus forums reveals the rollout is currently underway for the OnePlus 9 and OnePlus 9 Pro.
According to the updated official changelog, the camera improvements included in the new OxygenOS 11.2.5.5 update bring improved white balance performance and HDR effects in certain shooting scenarios. OnePlus has also made some adjustments to enhance the network communication stability and Wi-Fi performance of its best Android phones. It is said that the charging performance has also been improved. In addition to improvements and Android security fixes for May 2021, this update also fixes a bug that caused the keyboard to lag behind certain OnePlus 9 and 9 Pro devices. This is the complete changelog:
System
1. Charging performance has been improved.
2. Small probability lagging issue of the keyboard has been fixed.
3. Known issues and improved system stability have been fixed.
4. Updated Android security patch to 2021.05
Camera
1. Improved the HDR effect in some shooting scenes.
2. Improved the white balance performance of the rear camera.
Network
1. Improved the stability of network Communication.
2. Improved the performance of Wi-Fi connection
Since OnePlus has not officially confirmed the release of the OxygenOS 11.2.5.5 update, it may take a few days for this update to be widely used. If you don’t want to wait for a wider launch, you can use the third-party Oxygen Updater app in the Play Store to get the update.
John Shen 
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