Cheetah tool document

  EUB Connection Method (Exynos USB Boot) Overview EUB (Exynos USB Boot) is a low-level connection method used on Samsung devices powered by Exynos chipsets. It is the Exynos equivalent of EDL on Qualcomm devices and is typically accessed through Test Point or hardware-assisted methods. EUB enables direct communication with the Exynos SoC before the Android boot process begins. When Is EUB Required? EUB is typically used when: The device uses a Samsung Exynos chipset The device does not boot into Android Download Mode is unavailable or restricted Advanced repair or recovery is required Security restrictions block software-based access Test Point access is available How Does EUB Work? By forcing the Exynos chipset into USB Boot mode (usually via Test Point), the device exposes a low-level USB interface. This allows repair tools to communicate directly with the chipset for recovery, flashing, or [....]

  Download Mode Connection Method (Samsung) Overview Download Mode is a Samsung-specific low-level service mode used for firmware flashing and device servicing. It operates below Android but above chipset boot modes such as EUB or EDL. Download Mode is one of the most commonly used service modes for Samsung devices. When Is Download Mode Required? Download Mode is typically used when: Flashing official firmware Recovering from software corruption Repairing boot-related issues Servicing FRP-related scenarios (model-dependent) Android cannot boot normally Odin or compatible tools are used How Does Download Mode Work? When a Samsung device enters Download Mode, it initializes a dedicated USB interface that accepts signed firmware and service commands. The device communicates with flashing tools to write partitions such as boot, system, vendor, and recovery. Download Mode enforces Samsung securi [....]

  Fastboot Connection Method Overview Fastboot is a bootloader-level connection method that allows direct communication with the device before Android starts. It is commonly used for flashing, bootloader management, and advanced servicing operations on supported devices. Fastboot operates below the Android operating system but above chipset-level modes such as EDL or BROM. When Is Fastboot Required? Fastboot is typically used when: The device supports Fastboot mode Android does not boot properly Bootloader-level flashing is required ADB access is unavailable Repair tools need pre-OS access System or partition-level operations are needed How Does Fastboot Work? When the device enters Fastboot mode, the bootloader exposes a USB interface that allows repair tools to send commands directly to the bootloader. Fastboot provides more control than ADB but less than chipset-level modes. How to Co [....]