UPDATE:
OnePlus 9 is getting a new update with ColorOS 11.2 A.13 version. The update is rolling out in China. It brings several optimizations. Check the complete changelog.
System
[Optimization] Game experience of League of Legends mobile game
[Optimization] App installation operation experience
[Improved] System stability
The internet
[Improved] The stability of the communication function
[Optimization] Connection stability of personal hotspots
OCTOBER 19
OnePlus 9 devices in China are getting a new software update based on ColorOS 11. The latest update brings the October 2021 security patch and improves system stability.
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It also fixes some known issues. The update optimizes the fingerprint unlocking experience. The software version of this update is Color OS 11.2 A.12.
You can check the complete changelog below:
System
[Optimization] Fingerprint unlocking experience
[Upgrade] Android security patch to 2021.10
[Improve] System stability and fix known issues
Alarm clock
[Fix] The problem that the application does not respond in some scenarios
//Via
https://www.rprna.com/updates/oxygenos/download-oxygenos-12-october-17/
