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Unlocking the bootloader allows installing and running unsigned code on a device, including user customized software. Operating outside the manufacturer specification might usually result in voiding any warranties and may make the device susceptible to data theft, as the integrity of the operating system (as intended by the manufacturer) can no longer be guaranteed. [1]
LPDDR3 Dual-channel 32-bit (64-bit) 533 MHz (8.6 GB/s) APQ8064T Snapdragon 600 [83] LPDDR3 Dual-channel 32-bit (64-bit) 600 MHz (9.6 GB/s) APQ8064AB Snapdragon 600 [83] 4 cores up to 1.9 GHz Krait 300 Adreno 320 450 MHz (86.4 GFLOPS in FP32) MSM8936 Snapdragon 610 [84] 4 cores up to 1.7 GHz Cortex-A53: Adreno 405 550 MHz (52.8 GFLOPS in FP32)
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 Primary Bootloader (PBL), which is stored in the Boot ROM [3] is the first stage of the boot process. This code is written by the chipset manufacturer. [4] The PBL verifies the authenticity of the next stage. On Samsung smartphones, the Samsung Secure Boot Key (SSBK) is used by the boot ROM to verify the next stages. [5]
The debut of Apple's 64-bit A7 chip in the iPhone 5S forced Qualcomm to rush out a competing 64-bit solution, despite the capable performance of the Snapdragon 800/801/805, since their existing Krait cores were only 32-bit. [50] The first 64-bit SoCs, the Snapdragon 808 and 810, were rushed to market and released in 2014 using Cortex-A57 and ...
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 .
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. It requires that the device be started in Fastboot mode.
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.