What is this "calypso a318uu"

mrmazak said:

Phh aoap gsi a11 installs and runs good

To clarify, let me tel you all which build version i have installed and outline the steps to get it loaded.


THIS IS NOT INTENDED TO BE STEP BY STEP GUIDE ONLY AN OVERVIEW
WHATEVER YOU DO ON YOUR DEVICE IS AT YOUR OWN RISK


system-squeak-arm32_binder64-ab-vndklite-vanilla
downloaded from :

!. Bootloader must be unlocked.

AT&T removed the enable OEM unlock from developer menu, but there is an excellent work around 'tool' to get around this.
MTK CLIENT will allow you to read (pull) stock firmware off from phone, much like spflash tool does, except with this phone and many other newer phones the manufacture has enabled security and authorization files to block sp flash tool , SOOOO, tools like mtk client try to stay a step ahead.

I only used the GUI options with the client, it was very user friendly , the tool has way more options than i needed to mess with. 2. Before flashing gsi, make sure you have pulled firmware from phone, so you have stock super.img. If you don't you will not be able to restore device when / if you mess up the vendor partition.

3. I disabled vbmeta verification .
will need stock vbmeta from pulled firmware.

boot into bootloader, (adb reboot bootloader , or reboot while holding the volume up button. You should get a boot menu) (the last part need to point to you file location where ever it is)

4. Now we need to move from bootloader to fastboot. fastboot reboot command didn't work for me so needed to boot recovery first, then fastboot. hold volume up button to get boot menu, select recovery
from recovery select reboot fastboot

in the fastbootd connection you will be able to flash gsi
the system area is not large enough to fit gsi , so you will need to remove the /product partition. once completed use the screen menu to reboot back to recovery and perform factory reset.

With the exception of needing to use mtk client, the rest of these steps are standard android process. documented in many locations. I go to the android source first for information. \

Thanks a lot mrmazak, I'm working on a step by step guide for newbies like me to expand on your steps to unblock and reflash the phone.
I was able to use MRK Client, unlock bootloader and put the phone in fastboot.
The problem I have is to find the right MediaTek driver for the device USB\VID_0E8D&PID_201C

Where did you find them? I tried Google USB driver from ADP but they use different Device ID and all MediaTek driver with same VendorID 08ED have old ProductID instead of 201C.

Any help on MediaTek driver so I can finish the guide and post the link here?

Specifically, I was able to connect via ADB but Fastboot requires a different driver which I'm not able to find

Thanks a lot for your help!

They deleted the previous post, so I'm copy paste the steps from the blog post.

Pre-requirements​

Unlock phone bootloader​

Bootloader must be unlocked to install the new firmware.

MTK CLIENT will allow you to read stock firmware off from phone, except with this phone the manufacture has enabled security and authorization files to block sp flash tool.

Install Python 3.9 from Microsoft Store and Git – Downloading Package and daynix/UsbDk · GitHub, then open a CMD:

mkdir C:\test
cd C:\test
git clone https://github.com/bkerler/mtkclient
cd mtkclient
pip3 install -r requirements.txt
Once installation in complete, start MTK Client with

c:\Test\mtkclient
python mtk_gui
To activate BRUM mode for the phone and connect it to MKT Client

• Turn off the phone if it’s on.
• Press Volume UP + Volume DOWN and plug the USB cable.
• Do not press power button and MKT Client will detect it.

Backup:

• In the Read partition tab,
• Select all of them and Save to C:\Test\Firmware\Original
• It will take about 40min to complete all the operation

Unlock Bootloader

• In Flash Tools tab,
• Click on Unlock bootloader button
• Debug log will show Bootloader: unlock and python windows list

sej - HACC init
sej - HACC run
sej - HACC terminate
sej - HACC init
sej - HACC run
sej - HACC terminate
Progress: |██████████████████████████████████████████████████| 100.0% Write (Sector 0x1 of 0x1, ) 0.03 MB/s
If you restart the phone, you will see a warning that bootloader is unlocked and it will ask you to factory reset the phone.

Install the new firmware​

You need to have Android DevelopersSDK Platform Tools | Android Developers installed to be able to flash the new firmware.

Enable USB Debugging in the phone and connect ADB​

• Start the phone
• Perform a Factory Reset
• Restart the phone and complete the initial wizard
• Open Settings -> “About Phone” -> Tap the “Build Number” item seven times.
• You should get a message saying you are now a developer.
• Settings -> “System” -> “Advanced” -> “Developer Options.”
• Open the menu and enable “USB Debugging.”

To verify that ADB in installed correctly and is able to connect to the device:

CD C:\Test\Tools
adb version

Android Debug Bridge version 1.0.41
Version 33.0.1-8253317
Installed as C:\Test\Tools\adb.exe

adb devices

List of devices attached
AYMB5PKZCUEUUOSC device
Boot into fastboot with the following command adb reboot bootloader
or reboot while holding the volume up button and select fastboot.

Install Google ADB FastBoot driver in Windows 11​

Download Google USB Driver | Android Developers as they will be needed to connect the device via fastboot. To install the driver, we need to force the installation in Device Manager with these steps:

• Open Device Manager
• Right click on Other Devices \ Android device
• Select “Update Driver” -> “Browse my computer for drivers” -> “Let me pick from the list of available driver“
• Select “Show All Devices” -> “Have Disk“
• Navigate to “C:\Test\Tools\usb_driver_r13-windows” and let Windows load the drivers
• Select “Android Bootloader Interface” as driver name
• Test that Fastboot tool is able to interact with the phone

CD C:\Test\Tools
fastboot devices

AYMB5PKZCUEUUOSC fastboot
Next step is to disable vbmeta verification with the following steps:

Firmware update via Fastboot​

• While the phone is in the FastBoot mode, type the following:

CD C:\Test\Tools
fastboot devices
fastboot --disable-verity --disable-verification flash vbmeta "C:\Test\Firmware\Original\vbmeta.bin"

target reported max download size of 134217728 bytes
sending 'vbmeta' (8192 KB)... OKAY [ 0.204s]
writing 'vbmeta'... OKAY [ 0.189s]
finished. total time: 0.393s
After vbmeta image is flashed, perform:

• fastboot reboot fastboot to restart the phone and enter fastbootd
• Check the phone is connecting correctly with fastboot devices
  and force the installation of Android Bootloader Interface in Device Manager if needed.

The following step delete product partition so system partition has enough space:

fastboot delete-logical-partition product

Deleting 'product' OKAY [ 0.016s]
Finished. Total time: 0.016s
This command flash the custom rom on system partition:

fastboot flash system "C:\Test\Firmware\system-squeak-arm32_binder64-ab-vndklite-vanilla.img"

Invalid sparse file format at header magic
Resizing 'system' OKAY [ 0.016s]
Sending sparse 'system' 1/5 (255489 KB) OKAY [ 14.939s]
Writing 'system' OKAY [ 7.651s]
Sending sparse 'system' 2/5 (262100 KB) OKAY [ 15.141s]
Writing 'system' OKAY [ 7.705s]
Sending sparse 'system' 3/5 (262104 KB) OKAY [ 15.001s]
Writing 'system' OKAY [ 7.595s]
Sending sparse 'system' 4/5 (261825 KB) OKAY [ 14.752s]
Writing 'system' OKAY [ 7.711s]
Sending sparse 'system' 5/5 (183741 KB) OKAY [ 10.421s]
Writing 'system' OKAY [ 5.832s]
Finished. Total time: 107.885s
Once flash of new rom is completed, you can restart the phone and it will boot using the new rom.

Original post suggested to perform a factory reset.
WARNING: In my case, a factory reset caused a reboot loop and was not able to

If you want to proceed, in the menu on the screen:

• Select “Enter recovery” and
• Select “Wipe data/factory reset“

Screen on the phone will show

-- Wiping data...
Formatting /data...
Formatting /cache...
Formatting /metadata...
Data wipe completed.
If you missed the previous screen, or clicked the wrong button/option:

• restart the phone holding Volume UP,
• Select fastboot on the phone
• Type fastboot reboot fastboot to reenter fastbootd screen
• And repeat the factory reset

Restart the phone and you are up and running.

Restore original firmware​

If you need to restore original rom, use MKT Client tool to write:

• vbmeta.bin
• super.bin

then close the tool and restart the phone. It will be like new