Since the low-level download mode effectively has full control over the device’s storage, many OEMs including Xiaomi and Realme have started obfuscating the flashing process. A MediaTek-made proprietary program called “SP Flash Tool” can utilize this interface to force flash the system software on a device. It is strictly intended for OEM servicing and can be used to unbrick a device, just like Qualcomm’s Emergency Download Mode (EDL). It’s now easy to bypass MediaTek’s SP Flash Tool authenticationĭevices with MediaTek chipsets have a BROM (boot read-only memory), which typically loads the preloader executable and subsequently boots the Android system, but also houses an alternative boot mode known as Download mode.
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