Beyond the aesthetic changes, widespread reports of plagued the early builds. For the OnePlus 9 series, the OxygenOS 12 update was described as "bug-riddled," with users taking to online forums to express their disappointment. Specific problems included devices not recognizing SIM cards, severe battery drain, and the phone overheating. In some cases, the problems were so severe that devices ended up in a boot loop or became bricked, especially for those who tried the Android 12 beta. This forced the company to pull download links and provide users with rollback packages.
Before we dive into the process, it's essential to understand why someone might want to downgrade their OnePlus 9 to Android 11: Downgrade Oneplus 9 To Android 11
: This guide is for educational purposes only. Downgrading your device is done at your own risk. The author and this blog are not responsible for any damage or issues that may arise during or after the downgrade process. Beyond the aesthetic changes, widespread reports of plagued