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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. [2] [3] On Google's Pixel 3, the feature was accidentally shown to users after the phone ...
On the Qualcomm MSM8960 for example, the Secondary Bootloader 1 loads the Secondary Bootloader 2. The Secondary Bootloader 2 loads TrustZone and the Secondary Bootloader 3. [9] The SBL is now called XBL by Qualcomm and which is an UEFI implementation. Qualcomm uses LK (Little Kernel) or XBL (eXtensible Bootloader), MediaTek uses Das U-Boot. [1]
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. devices – displays a list of all devices (with the serial number) connected to the host computer.
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.
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]
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 .
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.
Google Pixel is a brand of portable consumer electronic devices developed by Google that run either ChromeOS or the Pixel version of the Android operating system.The main line of Pixel products consists of Android-powered smartphones, which have been produced since October 2016 as the replacement of the older Nexus, and of which the Pixel 9, Pixel 9 Pro and Pixel 9 Pro XL are the current models.