![]() ![]() The cable is designed with a toggle switch to short out the correct data pin and force the phone into EDL mode. Using a special cable to put the phone into EDL mode is probably the easiest method listed here. Below you can find instructions for all three methods, so you can get comfortable performing them to make use of this acquisition method. Finally, if the device is unlocked, you can use ADB or fastboot to reboot the phone into EDL mode. On some devices you can use a special cable, while others might require you to disassemble the device. There are three ways to put a device into EDL mode and no single method works on all phones. The method for putting a device into EDL mode can vary depending on the model. On supported devices, we can use EDL to extract a full image. Emergency Download (EDL) mode is a Qualcomm feature that can allow you to recover data from a device and perform tasks like unbricking or flashing the device. These charts are not necessarily exact representations of the boot chain on a specific SoC in a specific application, since modifications can be made by manufacturers by either replacing / editing one of the later links in the chain, or by adding more bootloader stages.Ī more close examination of these bootloaders will follow.Abusing Qualcomm EDL Mode for Device CaptureĮDL acquisitions are one of many ways you can bypass passcodes and gain physical access to many Android devices with Qualcomm based chipsets. Here is a triplet of charts showing the boot chains of relatively recent Qualcomm SoCs.Īs you can see, the main change introduced in msm8974 is the merging of SBL1, which used to consist of three bootloaders, into one,Īnd the main change introduced in msm8996 is support for the ABL UEFI bootloader - however, in some cases, aboot is still used. There are slight differences between the boot chains for different SoCs, The final stage is whatever operating system runs on the SoC. Qualcomm ARM SoCs make use of several bootloaders, each of which initializes and/or checks some things and then passes on execution to the next stage in the boot chain. Qualcomm is a semiconductors company, and one of the biggest manufacturers of smartphone and tablet SoCs. Some information contained within may be inaccurate or incomplete. ![]()
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