These days Android device users are prone to gain full control over the device subsystem to customize look & performance. If you’re one of the Oppo A9 users then you may be wondering whether you can unlock the bootloader, root, or install the custom ROM on Oppo A9.
Well, due to the open-source nature of Android OS, and its wide range of customizability options, it’ll quite easy for both developers & advanced users to unlock the device bootloader, flash custom recovery, flash custom firmware apart from rooting or flashing modules, etc. There are plenty of tools available in the market for MTK devices that can also do the job for you but there are specific limitations too.

Oppo A9 Device Overview
Oppo A9 was announced in April 2019 which sports a 6.53-inch IPS LCD display with a screen resolution of 2340 x 1080 pixels with 395 PPI pixel density. The device is protected by a 2.5D curved glass screen.
Oppo A9 is powered by a Mediatek MT6771V Helio P70 (12nm) chipset coupled with 4/6GB of RAM and 128GB of internal storage. It also supports a 256GB external memory card. The device came out of the box with Android 9.0 Pie under ColorOS 6 and was backed by a 4020 mAh battery (Non-removable). As far as the camera is concerned, the device has a Dual-camera setup with 16MP + 2MP primary sensors and a selfie camera with a 16MP lens. Other connectivity option includes 4G-VoLTE, GPS, Glonass, Bluetooth, Mobile Hotspot, accelerometer, ambient light sensor, gyroscope, proximity sensor, and compass/ magnetometer. etc. The Oppo A9 comes with a rear fingerprint sensor feature.
1. Can I Unlock Bootloader on Oppo A9?
Bootloader comes with a locked condition on each device and so the Oppo models need to be unlocked first to become able to get into the Android customization world.
It seems that you’re not being able to unlock the bootloader quite easily on your Oppo A9 because Oppo has blocked the bootloader unlocking process due to security measurements related to the device system and the user data.