Before you even attempt to flash anything, you must first determine exactly which variant of the Oppo A9 you own. This is critical because different variants have different chipsets, which dictates how (or if) a custom ROM can be installed.
A: Rooting is possible only if you unlock the bootloader. If you force-unlock the MTK version, you can patch the boot image with Magisk to gain root access. Oppo A9 Custom Rom
The Ultimate Guide to Oppo A9 Custom ROMs: Breathe New Life Into Your Phone Before you even attempt to flash anything, you
Treat this like a checklist. Do not skip any step. If you force-unlock the MTK version, you can
Assuming you’ve decided to go ahead with the customization route, here’s what you’ll need:
Open a command prompt window on your PC inside your ADB folder. Type fastboot devices to ensure your PC detects the phone.