The OnePlus 9 series launched to critical acclaim in 2021, primarily for its Hasselblad-tuned cameras and blazing-fast Snapdragon 888 chipset. However, for many users, the magic lived in —the operating system that shipped with the device out of the box.

To downgrade your OnePlus 9 to Android 11, you'll need to:

He held his breath. Put the phone into (power off, hold both volume buttons, plug in USB). The computer made a dun-dun sound. The tool recognized the device.

This process will irreversibly erase all your data, including photos, apps, and messages.

Now that you're prepared, let's dive into the step-by-step guide:

Even with careful planning, you may encounter problems. Here are some common issues and potential solutions:

What is your (e.g., LE2111, LE2113, LE2115)? Which Android version are you currently running?

Open your phone's internal storage directory on your computer.