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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 . On smartphones , this can be a custom Android distribution or another mobile operating system .
Some manufacturers, including Xiaomi, OnePlus, and Motorola, provide official support for unlocking the bootloader, allowing for rooting without exploiting a vulnerability. [46] However, the support may be limited only to certain phones – for example, LG released its bootloader unlock tool only for certain models of its phones. [47]
Screenshot of Device Manager, containing a Qualcomm device booted in the Emergency Download Mode. The Qualcomm Emergency Download mode, commonly known as Qualcomm EDL mode and officially known as Qualcomm HS-USB QD-Loader 9008 [1] is a feature implemented in the boot ROM of a system on a chip by Qualcomm which can be used to recover bricked smartphones.
The V20 ships with Android 7.0 Nougat and LG UX 5.0+ software. It was the first Android device to ship with Nougat. [13] [14] Updates to Android 8.0 Oreo for various models were released, but later versions are not supported. [15] LG supports unlocking the bootloader on US996, allowing them to be rooted and
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.
LG supports unlocking the bootloader of certain [15] G5 models. This allows them to be rooted, and allows custom ROM images to be installed. Several independent custom ROMs continued to be developed for some G5 versions independently of LG; for example LineageOS 20 (based on Android 13) continued to be developed as of August 2023. [16]
The *** is a device specific unlock key. flashing lock/oem lock *** – locks an OEM unlocked bootloader. erase – erases a specific partition. reboot – reboots the device into either the main operating system, the system recovery partition or back into its boot loader.
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.