Junsun V1 Pro MTK8259 4GB + 64GB Android 10 headunit

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Hello. I recently bought a headunit from Junsun with 4GB of RAM and 64GB storage (it seems that the other versions from Junsun do not have this SoC). Let's collect all information about this version only so we can help each other. I just installed this headunit in a Kia Ceed 2 from 2017. I did not take any screenshots of the software information, but I will add them as soon as I have them.
 

Balti Lopez

New member
Nov 30, 2020
1
0
hi, I have rcently installed this radio on VW Golf 7. I have ine doubt because the radio looks like don't turn off when ignition is off, because when I turn on the car again, the radio start from the main screen. It means the radio don't turn off when the car is off, and on whe the ignition is on. and looks like the radio keep resting but on (with a low battery consumption).

I want the radio switch off automatically when I the igniton is off.

is it possible? do you know any option to change that?
 
May I know what made you decide to return your unit?
I have 2 major issues: OBD BT app is not launching for me (Junsun support said it is my adapter's fault, the same adapter that they are selling). I tried all I could. The second issue is that it does not recognize any USB stick. I found out yesterday that the USB stick I was using it dead (not sure if it is because of the headunit). Without an USB stick I would not be able to update my headunit (not that there would be an update). When I kind of snapped at them, they just said it is my problem or that I should wait for their engineer to reply. Basically I got my product on November 19-20 and the week after that was spent with me writing them.

My personal take on the software is that it is too simple. I cannot use any of the car launchers I found (like Agama) because the system apps are only available in the default launcher. It is unfortunate because I wanted an unit with 4G/LTE (mobile Internet is working very well). I was fooled that it had a lot of reviews and a lot of orders, but most were mixed. I put it in a Kia Ceed 2 and I found on a Russian forum that Junsun has been put on a blacklist because there are plenty users not happy with their products. I had some issues with the frame for my Kia, it did not fit, some users said they cut the frame (I cut one of the plastic feet).
 

spyrosrotary

Member
Jan 8, 2008
8
0
I have bought Junsun 2/32 4G! I also have problems and I can't solve them with messages! I open dispute and they asked me to cancel it! I wonder if I would like to update firmware where I can find newer version? At settings model is 825X Pro!
 

pakyweb

New member
Jul 10, 2010
1
0
I have 2 major issues: OBD BT app is not launching for me (Junsun support said it is my adapter's fault, the same adapter that they are selling). I tried all I could. The second issue is that it does not recognize any USB stick. I found out yesterday that the USB stick I was using it dead (not sure if it is because of the headunit). Without an USB stick I would not be able to update my headunit (not that there would be an update). When I kind of snapped at them, they just said it is my problem or that I should wait for their engineer to reply. Basically I got my product on November 19-20 and the week after that was spent with me writing them.

My personal take on the software is that it is too simple. I cannot use any of the car launchers I found (like Agama) because the system apps are only available in the default launcher. It is unfortunate because I wanted an unit with 4G/LTE (mobile Internet is working very well). I was fooled that it had a lot of reviews and a lot of orders, but most were mixed. I put it in a Kia Ceed 2 and I found on a Russian forum that Junsun has been put on a blacklist because there are plenty users not happy with their products. I had some issues with the frame for my Kia, it did not fit, some users said they cut the frame (I cut one of the plastic feet).
I have the same issue, on my seat ibiza seek button on wheel don't work
 

laldoma

Member
Dec 6, 2020
8
0
I have 2 major issues: OBD BT app is not launching for me (Junsun support said it is my adapter's fault, the same adapter that they are selling). I tried all I could. The second issue is that it does not recognize any USB stick. I found out yesterday that the USB stick I was using it dead (not sure if it is because of the headunit). Without an USB stick I would not be able to update my headunit (not that there would be an update). When I kind of snapped at them, they just said it is my problem or that I should wait for their engineer to reply. Basically I got my product on November 19-20 and the week after that was spent with me writing them.

My personal take on the software is that it is too simple. I cannot use any of the car launchers I found (like Agama) because the system apps are only available in the default launcher. It is unfortunate because I wanted an unit with 4G/LTE (mobile Internet is working very well). I was fooled that it had a lot of reviews and a lot of orders, but most were mixed. I put it in a Kia Ceed 2 and I found on a Russian forum that Junsun has been put on a blacklist because there are plenty users not happy with their products. I had some issues with the frame for my Kia, it did not fit, some users said they cut the frame (I cut one of the plastic feet).
I solved the launcher issue by installing radio apk from “for_launchers” zip file found in this forum
 

Achilefs_k

Member
Jul 9, 2016
42
2
I solved the launcher issue by installing radio apk from “for_launchers” zip file found in this forum
Hi. I want to have Internet connection using phone data, by connecting the unit with mobile via bluetooth tethering.
I have paired phone and unit, I have enabled in unit bluetooth connectivity and I have enabled in phone settings Bluetooth tethering but I don't have Internet connection in unit. What else can I do?
 
Last edited:

djborsi

Member
Mar 5, 2019
23
3
Ravensburg
Hi,

here my experience with Junsun V1 Pro with MTK 8259 (detailed spec. of device in below screenshots).

1611240722227.png
1611240746293.png


My car is:
Mazda 3, produced 2010 (type BL).

1. The radio station memory is cleared after rebooting the device (i.e. after setting differen CAN Type), so I must always to set the radio channels from beginnig on.
>> this I can handle since I don't have to play with CAN Type setting all the time.

2. I cannot pin any widget, or any shortcut of an app the to any of the home screens! The system hangs up when I trying to pin something.
>> this is to solve by different launcher. I have tried with Nova launcher and took radio, bleutooth etc. app from “for_launchers” zip file. Was working fine.

3. During using a navigation app the music from radio and sounds from navi are not mixed. Radio is playing and when navi sound comes, then radio is reduced and overplayed, I couldn't find option to change it.
>> in the end nothing special, it is a matter of expectation and taste.

4. The reverse camera (gift from Junsun) is not working afer installation according to diagrams.
>> this stays unsolved...

5. After switching car gear to reverse any backview as Warning Line or as Assistance Line are not working, not appearing!
>> is unsolved,
maybe connected with issue no 4. (system doesn't detect camera, so also deosn't activate any backview).

6. After switching car gear to reverse the sound level reduction deosn't work!
>> is unsolved,
maybe also connected with issue no 4. (system doesn't detect camera, also deosn't activate any backview, so in the end no sound level change).

7. I did Reset to Factory Settings (through android interface) to correct the problem no.2 (see description above). It helped for a moment, so after some time (~15 minutes) the issue came back, so still I cannot pin any widget or shortcut to any home screen.

8. I cannot find any option to make Screen-Lock.
>> probably dedicated app would help, but I haven't tried.

9. The CAN info are not working with my car, so I cannot see any info about open doors, etc.
>> I was using CAN Type 145, as adviced by seller, but still was not working.


All of above issue I was trying to solve with seller via messages (my english is not perfect, but their ... terrible).
After upgrading the device to a new FW (provided by seller), after few days of discussion, I have decided to return the radio back. I did all according to agreement with seller and via aliexpress system and it worked fine. I got money back (211€) , all good.

The device, beside above described issues, worked really really well, fast and smoothly.
The GPS was catch fast and 4G with sim card slot extension worked really amazing (direct internet access as well as direct phone calls possible!).
The radio reception and the sound quality, also very good!

It is a pity, because the device looks like has a big potential, but the current FW is not perfect, so causing small, but many annoying problems.
Not sure about camera issue (no.: 4+5+6), if it is connected with FW or rather with CAN decoder...

I would consider to buy it again, but first I will wait for a better FW/OS/ROM, so I am looking forward for any news about it!

I hope the info will help some of you.
Greetings!
 
3. During using a navigation app the music from radio and sounds from navi are not mixed. Radio is playing and when navi sound comes, then radio is reduced and overplayed, I couldn't find option to change it.
>> in the end nothing special, it is a matter of expectation and taste.
This is the default Android behavior. Android plays by default one stream and audio streams have different priorities. Some have higher priority than others and only one can be played at one point. Whenever a higher priority sound comes, the current sound volume will be lowered for a while (any notification sound or Navi is considered to have higher priority).
For the other issues I personally blame the firmware. As I said before, their firmware is lacking and it is a shame. You had the 4G/LTE version as I did, I just did not connect the rearview camera.
 

jazzor

Senior Member
Mar 6, 2010
66
157
I have this head unit for an AUDI and here are some things I found:

The radio and other UI components come from the system app called "MainUI" which gets modified depending on the company/seller who puts their own touches to it. It is signed using the AOSP android platform certificate and you can install/replace it with another MainUI and things mostly work. MainUI is also moddable if you know how to recompile the apk as the code is not secured in any way. Simply resign it with the platform certificate and install via adb/usb.

The unit boots up in two different ways depending on how long it has been left off.
* cold bootup which starts with the animated "android" splash- this bootup will allow apps installed to run if it has the BOOT_COMPLETED intent in its manifest.
* Quickboot- this is where the bootup is fast and bypasses normal android boot. In order to have an app start in this bootup mode, you need to set the system property, for example, to start the "navigation" as per settings:
Code:
setprop sys.qb.startapp_onresume "L#P com.ts.MainUI#A com.ts.main.navi.NaviMainActivity#T 2#I 5"
the components are seperated by "#", and the format is L#P <package>#A <activity>
then you can add optional T <number of times run>#I <number of seconds between each run>

In this example it will try to start the navigation activity twice and 5 seconds in between. I noticed that if you just try to run it once, sometimes the UI is not ready and the activity fails. The "L" at the beginning means to try to rerun apps that were already running before shutdown, it only works sometimes.

Sometimes the system properties will not stick and gets reset by the device. I do not know why this is the case. Therefore to make this more permanent change, it needs to be added to the /system/etc/prop.default file.

Changing any system files requires booting into recovery (via android developer options and adb reboot recovery), mounting the system partition and using the root access "su":
Code:
su @#zxcvbnmasdfghjklqwertyuiop1234567890,.

then mounting the system_root as rewritable
Code:
mount -o rw,remount /system_root

Someone else posted the above information in another thread and was also on the russian 4pda forums, but ill add it here as well.

Bluetooth tethering works well generally, although you will find sometimes it will disconnect by itself. In order to fix this, go to the "phone" app and reconnect from there.
 

jazzor

Senior Member
Mar 6, 2010
66
157
Another thing I noticed was if you try to flash another rom, and get into a bootloop, there is no way to enter recovery (via the "RST" button or anything). The "RST" button as it turns out just turns off the device.

In order to fix a bootloop due to bad flash, have the "8259.bin" and "8259.upd" files in a usb disk and when the bootup says "detected", continually swipe the screen left and right. That will initiate a flash mode. This has saved me a few times already.
 

dev495

Member
Nov 1, 2012
22
2
Changing any system files requires booting into recovery (via android developer options and adb reboot recovery), mounting the system partition and using the root access "su":
Code:
su @#zxcvbnmasdfghjklqwertyuiop1234567890,.

then mounting the system_root as rewritable
Code:
mount -o rw,remount /system_root

Someone else posted the above information in another thread and was also on the russian 4pda forums, but ill add it here as well.

Bluetooth tethering works well generally, although you will find sometimes it will disconnect by itself. In order to fix this, go to the "phone" app and reconnect from there.

You can make su and remount in adb shell and /system will rw. And to adding app in quickboot is possible via edit qb_list.xml in /vendor/etc

I also modified stock launcher for mercedes and made knob working across android system as dpad.

Before change something need to make ROM backup with Flash Tool. And after that possible to get usual (not su @#...) root just via patch boot.img with Magisk and flash it back.

Also possible to hide status bar for some apps with adb command

I post some other advices at russain 4pda forum
 

jazzor

Senior Member
Mar 6, 2010
66
157
You can make su and remount in adb shell and /system will rw. And to adding app in quickboot is possible via edit qb_list.xml in /vendor/etc

I also modified stock launcher for mercedes and made knob working across android system as dpad.

Before change something need to make ROM backup with Flash Tool. And after that possible to get usual (not su @#...) root just via patch boot.img with Magisk and flash it back.

Also possible to hide status bar for some apps with adb command

I post some other advices at russain 4pda forum

How did you make the backup using flashtool? I tried and it said it does not recognise the system or something. Does the device have to be in fastboot mode or something?
 

dev495

Member
Nov 1, 2012
22
2
How did you make the backup using flashtool? I tried and it said it does not recognise the system or something. Does the device have to be in fastboot mode or something?
You need to install MTK drivers and connect laptop to usb port on which carplay works. After that you should enable readback and press reset button in hole. You may try this scatter files. MTK is generated from my device, AC8257 is part of Junsun ROM. I called my scatter as MTK because Flash Tool doesnt know AC chipsets. My device is 4/64 gb, another probably 2/32 gb
 

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Pelanas_

Member
Aug 10, 2019
16
0
Hi, I have this same radio. I tried to connect it to the computer as I read here and I could not do it. What I would like to do is to root it and if I can put the TWRP RECOVERY. I have not been able to extract the boot.img from the firmware.bin. On the other hand, the "back" button has been deconfigured and now the action it does when I press it, is that I turn off the screen. Do you know how to fix it? I have used the "BUTTONS REMAPPER" application but I have not achieved anything.

Best Regards
 

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  • 1
    Scroll trought this thread and you will find all you need:

    @jarrogames The for_launchers.zip file was already uploaded several times and many people are too lazy to use the search functionality. 🤣
    1
    I just received a reply from JunSun support that it's not possible to connect Internet through Bluetooth in the unit. The only option is mobile hotspot after all
    They told me the same thing and it's not true, I can do tethering by bt. I copy and paste from a post that I put pages back, I hope it helps you.

    My headunit is a kapud mtk8257, but it is very similar to Junsun V1 Pro.

    In 90% of the cases, if before connecting the bluetooth on the mobile I am already allowing tethering (phone) automatically the headunit picks up the internet from the mobile.
    But other times I have to force it: the button is "hidden", once connected to the phone, go into settings, click on the magnifying glass/search engine, look for "previously connected devices", click on your phone, and you will see that one of the buttons is "allow internet connection" or something similar.
    PS: I have the radio in Spanish language, but the name of the menus should be like this, or similar.
  • 2
    Are there any other codes except 8888,8878,8877 to try?
    Use at your own risk !!!!

    8888 - restricted settings menu
    8878 - full settings menu. Mostly what you're looking for.
    Additional info can be found here: https://forum.xda-developers.com/t/junsun-v1-factory-settings.4282295/
    1111 - load monitoring
    0 - update (mcuupdate_num)
    1 - some menu (csudy_num)
    2 - barcode
    3 - another barcode 8938003992756585897
    4 - reboot
    5 - color setting
    6 - set a new random Bluetooth name
    7 -
    8 - gis whitelist reset
    9 - system notification: device activated (in Chinese)
    0129 - CAN DATA
    5555 - save settings
    1912 - factory setup
    1812 - shop setup
    12345678 - update_apk update MainUI
    3699 - update_apk2
    5699 - update_apk3
    7788 - atc_log (engineering menu of the 4G modem)
    8877 - atc_factory
    Menu for changing the cutoff (filter) frequencies for the sub and line outputs (relevant for those who use external amplification):
    Code 8877 ---> Audio ---> Scroll to Sound Effect ---> Bass (or Alto (Middle), Treble).
    And also there is a setting and the ability to completely disable Loudness.
    USB mode can be changed here if required, too.
    7758258 - obligatory mode !! do not enter !!! Complete crap going on
    5678 - changing the menu code logo
    3234 - apk_install_pwd
    Alternatively (untested!) restore the engineering menu settings to the factory settings.
    2134 - appinfo_id_num
    6666 - install_id_num
    7777 - install2_id_num
    1616 - display_id_num brightness
    2064 - testmode_id_num
    1414 - reboot_id_num
    9191 - destroy_id_root_num
    9090 - destroy_id_num
    1313 - radio_reset_num
    1101 - screenshot_num
    4321 - filedelete_num
    1234 - filecopy_num
    2
    Firmware installed in meantime?
    Today I applied the Firmware Stock update procedure. The procedure was successful and the tablet works ok. It remains to put it back in the car and see how it behaves in tests. This was possible for the two users who thank them once again: djborsi and TorstenH. I removed the tablet from the car and made the connections to be able to work with a + 12V DC / 220v power supply. For those who want to power it separately from the car, I put some pictures after the procedure and a wiring diagram. I made a video with the FW update procedure. Because I noticed that the tablet heats up a lot, I mounted a 12V / DC fan, It has the size 70X70mm. and thickness 15 mm. It was from an old CPU cooler. It is fastened at the back with 4 screws as seen in the photo. I put a 40 Ohm series resistor. to reduce speed and noise. I hope that what I posted here will bring a little help to those interested.
    2
    But maybe you're interested in my new free app:
    1
    I just received a reply from JunSun support that it's not possible to connect Internet through Bluetooth in the unit. The only option is mobile hotspot after all
    They told me the same thing and it's not true, I can do tethering by bt. I copy and paste from a post that I put pages back, I hope it helps you.

    My headunit is a kapud mtk8257, but it is very similar to Junsun V1 Pro.

    In 90% of the cases, if before connecting the bluetooth on the mobile I am already allowing tethering (phone) automatically the headunit picks up the internet from the mobile.
    But other times I have to force it: the button is "hidden", once connected to the phone, go into settings, click on the magnifying glass/search engine, look for "previously connected devices", click on your phone, and you will see that one of the buttons is "allow internet connection" or something similar.
    PS: I have the radio in Spanish language, but the name of the menus should be like this, or similar.
    1
    Hi, I have this same radio. I tried to connect it to the computer as I read here and I could not do it. What I would like to do is to root it and if I can put the TWRP RECOVERY. I have not been able to extract the boot.img from the firmware.bin. On the other hand, the "back" button has been deconfigured and now the action it does when I press it, is that I turn off the screen. Do you know how to fix it? I have used the "BUTTONS REMAPPER" application but I have not achieved anything.

    Best Regards
    Did you try connect with Flash Tool after MTK driver installed? How did you understand that no connection? About buttons remap - consider should be enough to uninstall buttons remapper.
    What car do you have?