Installation to Google Pixel 3a XL
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I'm trying to install UT to a Gogle Pixel 3a XL.
I already unlocked the bootloader. It currently has Android 12, and so I'm trying to downgrade to Android 9, to the image that says in the devices page.
I downloaded the zip file corresponding to that image, but I don't know what to do with it. I've seen a "flash-all.sh" utility mentioned in other posts, but I can't find it to download from anywhere, I downloaded "platform-tools_r35.0.0-linux.zip " but this file is not here.
I tried to downgrade with Android Flash Tool in Chrome (from a linux machine). Chrome sees the device and connects to it, it starts the installation of the image. I puts the phone in fastboot mode, and then it aborts all the time (different cables, with "wipe data" and without, trying other options as "wipe al partitions" or similar.) The message is "Error connection", and "Error connecting to your device. Try disconnecting and reconnecting it. Failed to execute 'open' on 'USBDevice': Access denied. (open)".
So stuck here.
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You need to install the latest fastboot and ADB drivers.
Once that is done you need to download the fastboot flash version which will have the flash all.sh file in it.
Unzip the ROM to the folder where your fastboot file is found ( in Power Tools that you have downloaded).Put your device into fastboot mode, connect it to your pc. Open a command prompt in your fastboot folder containing the ROM and run the flash all command.
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@MrT10001 said in Installation to Google Pixel 3a XL:
You need to install the latest fastboot and ADB drivers.
I have the latest I think.
Once that is done you need to download the fastboot flash version which will have the flash all.sh file in it.
I've downloaded several, didn't see any "flash-all.sh" utility. Do you have a link to the one that has it?
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I finally managed to downgrade, quite unexpectedly.
I tried to install twrp recovery, to see if you could install the Android 9 image with it. I tried to flash it in fastboot mode with:
sudo fastboot flash boot twrp...img
(without sudo it wouldnt install)
and it got stuck in fastboot. I would not boot, or go to recovery, or anything.
Then I changed boot partition
fastboot set_active other
not that I had any idea on what I was doing, just as a result of desperation, since I saw this command somewhere. It moved from partition "a" to "b" but nothing changed.
Then out of boredom I went back to Google Chrome and Android Flash Tool and voilà, this time it downloaded and installed Android 9.
What a pain, it was a similar experience with an OP5 recently. It is a breeze to install UT, but downgrading Android can take you a full morning.
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@wgarcia I have found both these devices pretty straightforward to downgrade/upgrade (hey but that is me :beaming_face_with_smiling_eyes: ).
Pixel3a if you get stuck on the Google logo.... I will write something up when I get a chance.
I do have a Windows machine and Linux machine, find windows is "easier" with some devices.
