(matching your region code, e.g., C185, C432) from reputable sources like the XDA Developers forum Prepare the Drive Extract the downloaded firmware. Copy the folder named (containing the update_sd.base.zip and other files) to the of your USB drive. Flash the Firmware Turn off the phone. Connect the USB OTG drive. Volume Up + Power
You usually need to verify the ARB index of your current OS versus the target OS. If the ARB index has been upgraded in Android 12, downgrading to Android 10 is impossible without specialized engineering firmware. jny lx1 downgrade 12 to 10
Press and hold Volume Up + Power simultaneously until the eRecovery or Update screen appears. The device should detect the files and begin the downgrade. Troubleshooting Common Issues (matching your region code, e