[Android Head-Units] stabone00:
All instructions were performed on an Atoto A6 A62721P. There may be variations with other models.

What you will need:

Mediatek VCOM drivers ---> https://mtkusballdriver.com/download/mtk-usb-v1-0-8

SP Flash Tool for Mediatek Devices. ---> https://drive.google.com/file/d/1pkJ6lXKZ0IBAljHw3f0N7eeU9f4iW6b-/view

MTK Droid Tools with mod by Bovirus ---> https://xdaforums.com/attachment.php?attachmentid=4458732&d=1522117513 (has added info to recognize MT8127) Original file is from---> https://xdaforums.com/showthread.php?t=2160490

Notepad++ ---> https://notepad-plus-plus.org/download/v7.5.5.html

MT8127 Scatter File ---> https://xdaforums.com/attachment.php?attachmentid=4437810&d=15202295

(Most of this can be executed in linux, there is an SP Flash Tools, but I couldn't find an MTK Droid tools version)

To connect to the unit you need a male to male usb cable or mini male to full male usb adapter and usb cable.

Using the SP Flash tool requires full reboots. Since I didn't have the unit installed in a vehicle, I simply made up a 12 volt cord with two

light switches, one switch to 12V constant wire(yellow) and feeding other switch, which then goes to ACC wire(red).

You can also use the pull down and reboot, you just have to get the timing for plugging in the usb cable.

Connection is made to the quick charge usb port. You will want to disconnect and reconnect at that port, not at the computer.

All processes assume you have Developer options enabled, with OEM unlocking and USB debugging enabled. Also allow install from unknown sources

enabled in Security.

Backup and Recovery with SP Flash Tools and MTK Droid tools

With the unit turned off and not connected, open the sp flash tool folder and run sp flash tool as Admin.

For the Scatter-loading File, click choose and select the downloaded scatter file, MT8127_Android_scatter.txt.

Now click the Readback Tab.

Select add, to add an entry to the list below. Double click the the entry. You can make a folder to save it in, but leave the

name ROM_0.

After selecting save, you will get the Readback block start address screen. Type will be Hex, Region - EMMC_USER.

Start address will be left at 0x0000000000000000.

The length we can get from the scatter file. Open the scatter file in Notepad++.

The scatter file is your partition table along with other info. You can use the start address for the cache, so that will backup everything

to that point. The address is 0x00000000D4000000.

Select ok and then make sure the box on the left for the entry you created is checked.

Now click Readback.

With Sd Flash Tool Readback running, turn on both constant and acc to the unit.

Connect the usb cable to quickcharge port in four to five seconds after powering.

If you are too late it won't work and you will have to reboot. If you are too early it won't work either. If the Atoto screen appears on the

unit, you need to try again.

Once you connect, the bottom process bar in SP tools will first turn red, and then you will see the process as it is backing up your system

in blue.

I was having issues with the unit timing out before completing. I found that turning off the power to the ACC after about two minutes,

and then back on in two minutes, would keep the process from timing out. Just keep doing that until it finishes.

Once it has finished, disconnect and restart the unit. You can close the message that it finished in SP Flash.

Now you want to run MTK Droid tools downloaded from here, as admin.

When the unit is up and running, and MTK Droid tools up, connnect the usb to the unit.

In a few seconds, MTK Droid tools should recognize the unit and display some info. When that happens, click the "root.backup.recovery" tab.

Now you want to select "To process file ROM_ from Flash Tool".

Now go to the folder where you saved the ROM_0 and select it. This cut the rom into the actual partitions, making it flashable.

When asked "To make CWM recovery Automatically" select no, and then it will ask for an optional file to use, just click cancel.

When it has finished, go into the MTK Droid Tools folder, and in the backups folder, will be a folder with all of the partitions.

You will want to change the name of factory_NONmodified_recovery.img to just recovery.img.

To restore, run SP flash tool, and select the the scatter file from the backup folder. Always make sure that the Preloader is never checked.

Typically Preloader and Uboot are not checked, but make sure anyway. If the Preloader if erased, or accidently written over, you will have hard

bricked your device. Other mediatek devices(mainly phones) are able to recover from this by either booting into a hidden metamode, or by

finding a test point on the board marked KCOLO or COLO and grounding it. I have not found either of these methods to be available.

So don't mess with the preloader.

Flashing is the same method as before. When you see all the partitions loaded if SP Flash tool, click Download.

Power up the unit and connect the usb in four to five seconds. Turn ACC power on and off to keep it from timing out.

If you get an error in sp flash that it is the wrong scatter file, you should replace the scatter file in you backup folder with the one

downloaded from the link above.

Flashing a partition, such as recovery is the same process, you could simply put the recovery in a folder with the scatter file and then

select that in scatter in SP flash tool. (Flashing a custom recovery requires the system to be rooted)

Rooting

The easiest way to gain root I found, was by running KingOroot in windows, connected to usb. Once KingO has root, you have to replace KingOroot

with SuperSu. The first time, I replace files manually through ADB with root privileges.(Could also use ES File Exploer)

But an easier way is once KingOroot has root, do not reboot. Install SuperSU and then Run SuperSU, and when it fails, run it again. Eventually you will

see a prompt that SuperSU is asking KingOroot for root privileges. Grant it and run it again. When it fails, reboot the system. SuperSU should now have

root. Make sure kingoroot is gone. When you make SuperSU a system app, the only way to lose it is by unrooting in the SuperSU options.

If you got this far, you might have realized that a custom recovery is not exactly necessary, due to the SP Flash Tool. Once rooted, you could use Flashfire for apps

that need to be flashed, such as Xposed. However I did compile a TWRP recovery from Omnirom source using ---> https://xdaforums.com/showthread.php?t=2798257

There is an issue with it that it keeps going to lock screen, you just have to keep swiping to unlock.(Was able to 'cut out' the lock screen issue, no longer locking)But everything seems to be functioning.

You can get the custom TWRP recovery here ---> https://drive.google.com/open?id=1k_9rrG0_4dkw45cetUzbq0m0Q3VgZ7P1

I don't credit take this, there is tons of info on Mediatek devices on here, just do a search. I just took the info and found what works for this device.

Some other info: Fastboot is not enabled on this device. If you use adb reboot bootloader, You will see a fastboot mode screen for a moment, until the unit automatically reboots. I was able to get the screen to last for a while by either turning off power to the ACC or disconnecting and reconnecting the USB. Even though the screen remained on for a bit, there is no way to connect. You can also get to an odd Recovery like menu if you do adb reboot sideload and wait for it to timeout.

Could not find a way to connect to or control that either. And if you flash a custom recovery without having root, it will go to a factory reset.

My biggest issue with this unit is Atoto's Gui, I have been trying Nova Launcher and CarWebGuru, both seem to be much better options. After looking at some of the other units stock setup, I think this has to be one of the worst. Maybe one day atoto will decide to update it.

Thats really my only major gripe. There is the issue with radio being attached audio device, but it seems to be with a lot of these units.

Hope this helps anyone interested and gain's some interest in this unit.