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Similarly, another developer from XDA Developers launched a service to allow users to unlock the bootloaders of Samsung Galaxy S20 and Samsung Galaxy S21 Phones. Huawei announced plans to allow users to unlock the bootloader of the Mate 30 series, but later retracted that. [21] Huawei has stopped providing bootloader unlock codes since 2018. [22]
Some of the most commonly used fastboot commands include: flash – rewrites a partition with a binary image stored on the host computer. flashing unlock/oem unlock *** – unlocks an OEM locked bootloader for flashing custom/unsigned ROMs. The *** is a device specific unlock key. flashing lock/oem lock *** – locks an OEM unlocked bootloader.
Odin is a utility software program developed and used by Samsung internally which is used to communicate with Samsung devices in Odin mode (also called download mode) through the Thor (protocol). It can be used to flash a custom recovery firmware image (as opposed to the stock recovery firmware image) to a Samsung Android device.
Little Kernel is a microkernel for embedded devices, which has been modified by Qualcomm to use it as a bootloader. [10] The Android Bootloader (Aboot or ABL), which implements the fastboot interface. Android Bootloader verifies the authenticity of the boot and recovery partitions. [4] By pressing a specific key combination, devices can also ...
Additionally, certain Samsung devices lack the ability to flash custom software, namely Samsung phones and tablets released in North America after 2015, with an exception for devices lacking a cellular modem, [68] although there are exploits that can unlock the bootloader on some affected devices running older One UI versions. [69]
CalyxOS preserves the Android security model, using Android's Verified Boot system of cryptographic signing of the operating system, and running with a locked bootloader. [ 3 ] [ 4 ] CalyxOS also features an installer that guides the user through the process of unlocking and then re-locking the bootloader.
Team Win Recovery Project (TWRP), pronounced "twerp", [4] is an open-source software custom recovery image for Android-based devices. [5] [6] It provides a touchscreen-enabled interface that allows users to install third-party firmware and back up the current system, functions usually not supported by stock recovery images.
Examples include the Wiibrew program BootMii used to fix semi-bricked Wiis, the Odin program used to flash firmware on Samsung Android devices, [7] or the fastboot Android protocol which is capable of re-flashing a device with no software installed. [7] A soft-bricked rooted Kindle Fire can be un-bricked by using unrooting tools.