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An unlocked bootloader, showing additional available options. Bootloader unlocking is the process of disabling the bootloader security that makes secure boot possible. It can make advanced customizations possible, such as installing custom firmware.
Fastboot is a communication protocol used primarily with Android devices. [1] It is implemented in a command-line interface tool of the same name and as a mode of the bootloader of Android devices. The tool is included with the Android SDK package and used primarily to modify the flash filesystem via a USB connection from a host computer.
The Google Nexus and Pixel line of devices can have their bootloader unlocked by simply connecting the device to a computer while in bootloader mode and running the Fastboot protocol with the command fastboot oem unlock on older devices, [50] or fastboot flashing unlock on newer devices. [51]
Motorola did characterize the unlock option as a forward-thinking option, which leaves us not so secretly wishing that high-profile future releases expand the list of unlockable devices a bit further.
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 boot in recovery mode. Android Bootloader then transfers control to the Linux kernel.
A Samsung Galaxy A02s booted into recovery mode. The Android recovery mode is a mode of Android used for installing updates and wipe data. [1] [2] It consists of a Linux kernel with ramdisk on a separate partition from the main Android system. Recovery mode can be useful when a phone is stuck in a bootloop or when it has been infected with ...
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.
The Droid Razr is upgradeable to version 4.1.2 Jelly Bean. The release of the update began on March 8, 2013 for Verizon Wireless Users. The official Over the Air (OTA) update was released soon after. [13] The Droid Razr has official support from the LineageOS project, the latest available version being 14.1, which is based on Android 7.1.2. [14]