If you see a warning recommending version 3.0.1504.0 instead of 3.0.1512.0, follow that recommendation. Many GSM forum posts confirm that downgrading to version 3.0.1504.0 resolves detection issues.
This method does NOT bypass LK (Little Kernel) verification. On many newer Oppo devices, full bootloader unlocking still requires the official Deep Testing app and server-signed authorization, making partial modifications insufficient for a truly unlocked state.
The MediaTek Preloader is the initial boot code executed by the application processor when a device powers on. It initializes the system hardware, sets up the random-access memory (RAM), and prepares the environment to load the main Android operating system. oppo realme mtk preloader hot
If none of the above works, the phone might actually have a hardware problem causing an authentic thermal shutdown:
: This indicates a secure boot lock. You must use an auth-bypass tool. If you see a warning recommending version 3
Understanding and managing the preloader is crucial for several reasons:
Always ensure your phone has at least 50% battery before initiating an OTA update, and never unplug it while it is updating via a PC. On many newer Oppo devices, full bootloader unlocking
If your phone is hot to the touch and loops in "Preloader" even without being plugged into a computer, it is likely suffering from a hardware short. Check your charging cable and wall adapter for damage.
: A boot state used to establish communication between the phone and a PC before the Android OS starts. It is accessed by powering off the device and holding Volume Up + Volume Down while connecting the USB cable.
In newer security patches (mid-2023 onwards), many brands have "fused" or blocked BROM mode. This means tools can no longer force the phone into a deep service state using just volume buttons.