![]() Hence, my question, how can I know what is the exact version of the android 10 factory image installed on my Pixel 3L? Googling doesn't seem to help, as most pages talk about how to install factory images, not how to find out what is the version installed. ![]() I would like to find out what is the actual factory image installed on the Pixel 3L, so I can try to patch the matching boot image. I'm guessing the problem is that I didn't know what was the factory image actually installed on my Pixel 3L, so I just guessed it was the latest, but the boot image from the latest might have some incompatibility with the actual factory image in the phone. Namely, it could boot, adb shell works, etc., but it no longer responds to touch, so can't be used except for adb shell. However, after fastboot flash of that patched boot image, it only worked partially. I tried to fix the Pixel 3XL by getting the latest android 10 factory image for it and patching the boot image with magisk. Unfortunately, I had mixed up my two phones in the fastboot flash step at first, and so then I ended up with the Pixel 3a with android 11 rooted again, but also with the Pixel 3XL stuck on boot, I guess because it had a wrong boot image (for pixel 3a actually) flashed into it. So, I patched the corresponding boot image for the latest android 11 factory image for pixel 3a, and fastboot flashed it, and it worked. Recently I found that it had lost root, presumably because android 11 is out of beta and the phone had upgraded to the latest android 11 and was not using the magisk-patched boot image anymore. I had previously installed magisk on the Pixel 3a when android 11 was in beta. ![]() Phones with Qualcomm chips may boot into EDL mode when a severe fault is detected that makes it impossible for the phone to boot, meaning that the right files might not even flash, or if they do, the phone still may not boot.I have a Pixel 3XL on android 10 and a Pixel 3a on android 11. Even if the right files for the Pixel 3 and 3 XL were obtained, there's no guarantee that the problem that caused these devices to enter EDL mode in the first place would be resolved by a factory restore. To restore the factory firmware on a device in EDL mode, you need both a NAND image and QPST, or the Qualcomm Product Support Tool. It's also difficult to diagnose the problem: Some Googlers in the support thread asking for Android's generated bug reports were left hanging since users aren't able to get these reports without a working phone. Since EDL mode is designed to flash special types of images and not regular 'fastboot' packages that Google releases, there's currently no way to recover the Pixel 3 or 3 XL from this mode. In those cases, it was possible to recover the phone by installing a modified boot image, but in this case, no such fix has been discovered yet. It's reminiscent of the Nexus 5X and Nexus 6P, two devices that had their own failure-to-boot problems in the past. Reports of this problem are piling high on Google's issue tracker, support forums, and Reddit (via ArsTechnica).
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