[General Discussion] QF001 (ROCO K706) Head Units with UIS 7862s (not FYT based) [read first post first]

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Jun 6, 2023
12
2
Hello all,

it seems that there are some QF001 owners out there but not much informations. So i will try to collect everything and put it at one place.

The original manufactor is shenzhen jitu technology co. ltd.

These units are sold from Ossuret, Hizpo and other brands. This are the sellers specs:
View attachment 5775225

The Android 12 is fake which is Android 10 in reality.

I have the 8/128GB Version myself:
View attachment 5775229

Codes for the factory settings menu:

Different firmware versions are inside this thread. Take care of the right MCU file and beware that clear user data is enabled by default on update. There is also a dedicated firmware thread: https://forum.xda-developers.com/t/...s-with-uis-7862a-7862s-not-fyt-based.4541261/

Dedicated thread for gaining recovery access: https://forum.xda-developers.com/t/...uret-s4-s8-uis-7862-headunits-no-fyt.4538107/

Beside the faked Android 12 Version the head unit seems to be a good bang for the buck. I´ve paid around 230 Euros including VAT and shipping. The unit runs stable and powerful so far. Everything works as expected. The Android is a bit downcutted by the manufactor. There are no text notifications in the statusbar e.g. But i can compensate that with widgets.

Against the description android auto works wireless with my Xiaomi Mi10t pro. So that's also nice to have.

Tweaks, mods and others:
- my wire harness was labeled wrong. Key 2 and Key GND were swapped. So better check the cables before connecting. For me the correct wire names/functions were in the printed manual.

- replacement fan that fits my model: Sunon MF35101V21000UA99

- there's a sleep whitelist in the factory settings menu that prevents apps from being killed in standby mode (ignition off). That's very useful. I've whitelisted Google maps e.g. and don't lose my programmed route anymore if i turn off the engine for a short stop.

- tasker trigger for warm boot: detect any USB device connected. (You have to plug in something into the usb port, dashcam or pendrive e.g.)

- the status bar only shows a few symbols and no text notifications. Therefore I use a notification widget in combination with nova launcher. This way I can see all notifications in a widget which would be at the status bar originally.

- wireless ADB is enabled by default with root user. 🎉 The port is 9876. ( I've found that inside the build.prop)

- if you want to have a look inside the firmware you can use a rom kitchen tool like CBR

- how to change the boot logo:
1. If your player is 1280*720 screen, you need to rotate the picture 90 degree, and cut it into 720*1280 size, transform the picture to .BMP format.
2. If your player is 1024*600 screen, you need to cut the picture to 1024*600 size, transform the picture to .BMP format.
3. copy the picture into your Udisk root path, and then connect Udisk to the player. follow the steps settings-factory-8888-Logo set-then you can see your picture and select it- click update logo.
- how to change boot animation: https://forum.xda-developers.com/t/...uis-7862s-not-fyt-based.4525675/post-88086835

- enhance the microphone and call quality by using the external microphone and disable the internal microphone by masking two pins of a ribbon cable. It's explained inside this thread (link to post will follow)

- GPS tweak: https://forum.xda-developers.com/t/...uis-7862s-not-fyt-based.4525675/post-88112693

Known issues:
- "hey Google" (activate the assistant by hotword) doesn't work
- no car speed dependent volume control (manufacturer says it would be implemented later)
- the firmware is a debug release which is a serious security risk (every app or malware can get root access through ADB shell). On the upside you can also get root access through ADB and do everything you want

To be continued...

Cheers
blue_one
1. Any guide on how to install nova launcher/custom launcher? is it from Google play store? or .apk.
2. I cannot connect BT Teathring from my samsung s22 ultra and have internet. I get internet only by connecting to home wi-fi. I want internet on HU to say use google or youtube. I can stream music via Zlink with wire and wirelessly.
 

Clyde72

Senior Member
Dec 3, 2022
574
190
Samsung Galaxy A70
Lenovo P11
1. Any guide on how to install nova launcher/custom launcher? is it from Google play store? or .apk.
2. I cannot connect BT Teathring from my samsung s22 ultra and have internet. I get internet only by connecting to home wi-fi. I want internet on HU to say use google or youtube. I can stream music via Zlink with wire and wirelessly.
1. Nova launcher is on Google Play store
2. You can connect the unit to your phone via wifi by making a hotspot on your phone. Look for it in your network/connections settings on your phone. I had to force it to 2,4Ghz for it to work. That is no deal for me. I have stable internet for months using the 4G data plan of my phone. No need for BT Tethering.
 

divxdvd

Senior Member
Feb 2, 2007
52
6
Albuquerque
Seller sent me this.... New 10.33" screen with 1600x720 QLED screen. Thoughts?

He also mentioned they will be on sale June12th....

1686363359995.png
 
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Reactions: xdsbx
Jun 6, 2023
12
2
1. Nova launcher is on Google Play store
2. You can connect the unit to your phone via wifi by making a hotspot on your phone. Look for it in your network/connections settings on your phone. I had to force it to 2,4Ghz for it to work. That is no deal for me. I have stable internet for months using the 4G data plan of my phone. No need for BT Tethering.
Thanks @Clyde72 ; I am aware of hotspot but BT tethering doesn't drain battery.
 

Gyovany96

Senior Member
Apr 11, 2013
1,042
859
Seller sent me this.... New 10.33" screen with 1600x720 QLED screen. Thoughts?

He also mentioned they will be on sale June12th....

View attachment 5929577
Personally I wouldn't upgrade the screen to this or even the 2K model. More pixels means more work for the CPU even in stand-by and for a car the original 1280x720p QLED is more than enough in my opinion.
 

Gyovany96

Senior Member
Apr 11, 2013
1,042
859
Is there a way to change the Speedometer source from GPS to CAN on the homescreen widget? Sometimes due to poor GPS reception it shows fake speed or even ghost speed when the vehicle is stationary.

Or maybe some more Gps tweaks? I've already done the tweaks posted on OP.
 

mk148a

Member
Dec 5, 2020
33
5
Hello all,

it seems that there are some QF001 owners out there but not much informations. So i will try to collect everything and put it at one place.

The original manufactor is shenzhen jitu technology co. ltd.

These units are sold from Ossuret, Hizpo and other brands. This are the sellers specs:
View attachment 5775225

The Android 12 is fake which is Android 10 in reality.

I have the 8/128GB Version myself:
View attachment 5775229

Codes for the factory settings menu:

Different firmware versions are inside this thread. Take care of the right MCU file and beware that clear user data is enabled by default on update. There is also a dedicated firmware thread: https://forum.xda-developers.com/t/...s-with-uis-7862a-7862s-not-fyt-based.4541261/

Dedicated thread for gaining recovery access: https://forum.xda-developers.com/t/...uret-s4-s8-uis-7862-headunits-no-fyt.4538107/

Beside the faked Android 12 Version the head unit seems to be a good bang for the buck. I´ve paid around 230 Euros including VAT and shipping. The unit runs stable and powerful so far. Everything works as expected. The Android is a bit downcutted by the manufactor. There are no text notifications in the statusbar e.g. But i can compensate that with widgets.

Against the description android auto works wireless with my Xiaomi Mi10t pro. So that's also nice to have.

Tweaks, mods and others:
- my wire harness was labeled wrong. Key 2 and Key GND were swapped. So better check the cables before connecting. For me the correct wire names/functions were in the printed manual.

- replacement fan that fits my model: Sunon MF35101V21000UA99

- there's a sleep whitelist in the factory settings menu that prevents apps from being killed in standby mode (ignition off). That's very useful. I've whitelisted Google maps e.g. and don't lose my programmed route anymore if i turn off the engine for a short stop.

- tasker trigger for warm boot: detect any USB device connected. (You have to plug in something into the usb port, dashcam or pendrive e.g.)

- the status bar only shows a few symbols and no text notifications. Therefore I use a notification widget in combination with nova launcher. This way I can see all notifications in a widget which would be at the status bar originally.

- wireless ADB is enabled by default with root user. 🎉 The port is 9876. ( I've found that inside the build.prop)

- if you want to have a look inside the firmware you can use a rom kitchen tool like CBR

- how to change the boot logo:
1. If your player is 1280*720 screen, you need to rotate the picture 90 degree, and cut it into 720*1280 size, transform the picture to .BMP format.
2. If your player is 1024*600 screen, you need to cut the picture to 1024*600 size, transform the picture to .BMP format.
3. copy the picture into your Udisk root path, and then connect Udisk to the player. follow the steps settings-factory-8888-Logo set-then you can see your picture and select it- click update logo.
- how to change boot animation: https://forum.xda-developers.com/t/...uis-7862s-not-fyt-based.4525675/post-88086835

- enhance the microphone and call quality by using the external microphone and disable the internal microphone by masking two pins of a ribbon cable. It's explained inside this thread (link to post will follow)

- GPS tweak: https://forum.xda-developers.com/t/...uis-7862s-not-fyt-based.4525675/post-88112693

Known issues:
- "hey Google" (activate the assistant by hotword) doesn't work
- no car speed dependent volume control (manufacturer says it would be implemented later)
- the firmware is a debug release which is a serious security risk (every app or malware can get root access through ADB shell). On the upside you can also get root access through ADB and do everything you want

To be continued...

Cheers
blue_one
hello thank you very much for that infos. Its very helpfull to me, i jus buy s5 device from aliexpress. And i have issue when i try to run any benchmark app...

I am write the seller, and they said make firmware update, i'll try it.
Here its error:
1686406507300.png


Full video about crash:
 

Astralech

Member
Mar 3, 2023
47
15
Is it possible to automate the screen brightness and Google maps bright or dark theme by head lights on or off?
I have it marked that it should change with the headlights, only it doesn't work. Once I drove under an overpass the theme changed to dark with the headlights, then when it got dark the headlights turned on and the maps stayed bright. The next day I started after midnight and the maps were dark from the start. The switch to the light theme happened around sunrise time when the headlights were still on.
 

itiswitis

Senior Member
Oct 3, 2010
65
21
Is it possible to automate the screen brightness and Google maps bright or dark theme by head lights on or off?
I don't think google maps dark theme can be controlled by headlights. The google maps app is also missing the "Themes" option in settings, which is available on my phone, this should allow the app to match device theme. I've tried different versions of the google maps apk, all missing the "Themes" option. But navigation from google maps will switch to dark mode.

I've been using Here WeGo as an alternative maps app, it has option to force dark mode and maps download for offline mode.
 

asd89553

New member
Jun 5, 2023
2
0
Hello everyone, please tell me if it is possible to install magisc on this device to install Moto Dolby Audio / Audio FX Port or Dolby Atmos Port
OnePlus 8 or ViperFX. The fact is that when I connect my smartphone via bluetooth (there is root access and Moto Dolby Audio), the sound becomes much better and louder, and I would like to be able to do this without connecting my phone. maybe there are some other ways (without magisk) to install these AudioFx please tell me
 

Zlatko580

Member
Jun 24, 2012
14
1
Hi all, if anybody would like to test a very early alpha version of NavRadio(basic), they can find it here:
Download NavRadio BASIC for QF01

it's incomplete, full of bugs, it surely crash here and there but still usable.
I have enabled Google Crashlytics to help me debug all the crash and ANR so more people use it and more i'll fix it.

The full version will come when the free version will run smootly.
Enjoy;)


NOTES:

- Autoscan is done by MCU and it's fixed to 18 stations. Anyway you can use Autoseek function to find more stations or add new ones to the existing ones.
- The first frequency at startup need to be fixed.
- Sometimes you can hear the sound muting for a second, it's because the ROCO service think that navradio is a player and not a radio. I'll look for a fix later on..
After two days of use noticed two more bugs.

1. Crash every time when google maps voice navigation start speaking.
2. When signal is low on selected station, it starts AF (not in background but hearable changing frequencies) and find better signal on other frequency. Then changes selected channel to some other pre assigned channel from different radio station.
For example: select ch. 4 (HIT FM 95,00mHz), low signal, AF start searching, find better quality for HIT FM at 100mHz, then switches to ch. 6, set ch.6 to 100mHz.
At ch. 6 previously was some other radio station at other frequency.
 

KoTiX2

Senior Member
Jul 10, 2010
2,634
1,727
Realme GT
After two days of use noticed two more bugs.

1. Crash every time when google maps voice navigation start speaking.
2. When signal is low on selected station, it starts AF (not in background but hearable changing frequencies) and find better signal on other frequency. Then changes selected channel to some other pre assigned channel from different radio station.
For example: select ch. 4 (HIT FM 95,00mHz), low signal, AF start searching, find better quality for HIT FM at 100mHz, then switches to ch. 6, set ch.6 to 100mHz.
At ch. 6 previously was some other radio station at other frequency.
1.ok I'll check it.
2. How does the original app work? Does it the same?
 

Zlatko580

Member
Jun 24, 2012
14
1
I have to check, but I didnt noticed that bug at stock radio app.
About AF in background, it is not possible to achive because its MCU releated?
 

le_mi

Senior Member
Jul 30, 2016
164
27
I have it marked that it should change with the headlights, only it doesn't work. Once I drove under an overpass the theme changed to dark with the headlights, then when it got dark the headlights turned on and the maps stayed bright. The next day I started after midnight and the maps were dark from the start. The switch to the light theme happened around sunrise time when the headlights were still on.
Where did you mark it? Can´t find any option.

I am very disappointed about this unit. Sleepmode does not work, whitelist to, stock radio app don´t start automatically after cold boot and Maps is only in bright mode. I think i´ll return the unit and switch to an FYT.
 

herranz99

New member
Jun 11, 2023
2
0
Hi, im new here.
I have two problems with my S8 radio system:
-At first my 4G signal y so good but i can`t use the internet on the radio. The app of spotify tells me that im not connected to the internet and if you serch anything on google chrome it doesn`t work
-My second problem is that the Carletter APP for using the android auto stopped working overnight wireless mode. It only works when i plug the USB cable to the mobile.

Anyone knows any solution please. I asked to de dealer for a software update but it doesn`t soe anything

My car is BMW e90 in case it's useful for something
Thank you
 

ImBenny

Member
Apr 13, 2020
38
16
Hungary
gmgaming.hu
Android Auto via Carletter wireless not working with 0508 FW.
Any solution?

I think Carletter app can't share WiFi hotspot thats the problem.
Update about this problem:

I deleted and reinstalled Android Auto app on my phone and the Wireless AA worked only once on the first run.
After that I reverted back the version from 9.5 to 9.4 and I got it work again more than once till it started the fail again randomly.
I am 100% sure about that the fault is caused by the phone.
Maybe the Carletter app version is too old for the latest AA. But it says it is up to date.
I haven't tried the Zlink yet because it is Unactivated to me.
 

Top Liked Posts

  • 5
    I am writing an answer to my question dedicated to specialists of this topic who do not know how the device works, but only write their guesses, and they confidently think that everyone is stupid!
    Changing the MCU version QF01 to the QF03 version is possible and very easy! Changing the version did not negatively affect my system in any way! The screen did not turn on from time to time and the seller himself told me to change the MCU, sent this version and told me how.
    To change the version of QF01 to QF03, you need to enter the code 774411 in the factory settings and then download a new MCU. The board version has nothing to do with the MCU ! As I understand it, there will be no more MCU 01 version
    3
    Is there any advantage of using Android Auto or CarPlay on the Android HU if all apps you need are installed on HU and the HU has its own sim car with cell service?
    In my opinion there's absolutely NO advantage to use AA/CarPlay if you have 4G SIM with good signal coverage. You only get hotter HU being moooore busy running AA/CarPlay wich will also runs slower and also draining your phone battery for no reason.

    Later Edit: Also I see no advantage to use AA/CarPlay at all on Android HU, even with phone Hotspot is better if you don't have an 4G SIM or good coverage/speed!
    2
    Some features are better on Teyes than Sx.
    The CPUs are not the same, either.

    UI: they are all similar, true, but the graphics of a UI are subjective, I don't like the UIs of both Sx and Teyes, for example.

    A real IMPORTANT point for me is the display, in particular its sharpness, brightness and anti-glare, lasts the day, with direct sun.

    Well, with my S8 8GB\128GB as I have written here several times it is VERY BAD, very low brightness, during the day at 100% almost not readable what is running underneath. Anti-glare film does not exist...

    IF Teyes CC3 2K instead has a better screen, which you can see perfectly during the day, for me it would already be a great thing, even if it costs more than Sx units, but the problem...is all this true or does Teyes just want to advertise\marketing ?

    Anyone who sells advertises their product for sale even more than reality, to sell it...

    ONLY someone who has purchased and uses the latest Teyes CC3 2K units could truly say that!
    Now i'm waiting for cc3 2k, so when it comes, i'll say some more, compare to s8 unit which i use since february
    2
    I have a QF03 never had a single issue with it. Have updated to latest firmware and have done 1 mcu update (1 more available not sure if I will install)
    Of course, MANY problems also arise from poor writing of the latest firmware and MCUs released by developers.

    My advice:
    If you have the unit that works well, don't chase constantly new firmware and MCUs, leave the working one as it is.
    2
    Hello,
    I have this headunit in the variant S5:
    https://a.aliexpress.com/_mNPpRPg

    It is working fine, but after turning it on the first time the screen went black after five to ten minutes. After turning it off for seconds and turning it back on the screen works fine for a few seconds but then it turns black again.

    The radiator on the back is connected to power so heat shouldn't a problem. When the screen is turned black audio is still working fine and all the my steering wheel controls are working.
    Also the touchscreen is working as well as the buttons on the left side of the display.

    After using it for a few rides (3*20ish km) the sreen turned white 5 minutes after it turned black. Then again it turned black but had some weird grey stripes. These stripes were also visible even after a car stop, whilst i was seeing the home screen.

    Is this a already known issue or did a catch a faulty device?

    The seller was sending me this link after i contacted him about the problem:
    The system firmware link: https://jitu2fixgreenscreen.oss-eu-central-1.aliyuncs.com/update.zip

    A video showing my problem:
    Don't listen to this nonsense about the MCU! I have exactly the same version, upgraded from 01, the seller himself told me and told me how to do it! Everything works well and there are absolutely no problems related to the MCU! I will tell you more that as I understand it, absolutely all new devices work on version 03, and version 01 is no longer supported! The seller himself explained to me that version 03 is an updated version 01. I will tell you that 100% you need to look for a solution to the problem only with the seller! For example, in my case, the seller directly solves problems with the manufacturer and gives me answers the next day. In the same group, since the appearance of version 03, they say that it cannot be installed on 01, they say the board is not the same... In fact, it is very easy to install and the board is the same!
    I write rudely on this issue, because people who write false information based on their guesses are annoying, and when you criticize them, they turn your message into spam!
    NEVER REARRANGE THE MCU ONLY AT WILL! THIS CAN TURN YOUR DEVICE INTO A BRICK, THERE ARE ALREADY A COUPLE OF SUCH CASES IN THIS BRANCH! MAKE SURE 100% THAT THE MCU SUITS YOU, ASK THE SELLER AGAIN, THEN CHANGE IT! IF YOUR DEVICE WORKS PROPERLY, YOU DON'T NEED TO CHANGE THE MCU, JUST THE FIRMWARE!
    Look for the answer from the seller!
  • 27
    Hello all,

    it seems that there are some QF001 owners out there but not much informations. So i will try to collect everything and put it at one place.

    The original manufactor is shenzhen jitu technology co. ltd.

    These units are sold from Ossuret, Hizpo and other brands. This are the sellers specs:
    specs.JPG


    The Android 12 is fake which is Android 10 in reality.

    I have the 8/128GB Version myself:
    Screenshot_20221129-085346.png


    Codes for the factory settings menu:

    Different firmware versions are inside this thread. Take care of the right MCU file and beware that clear user data is enabled by default on update. There is also a dedicated firmware thread: https://forum.xda-developers.com/t/...s-with-uis-7862a-7862s-not-fyt-based.4541261/

    Dedicated thread for gaining recovery access: https://forum.xda-developers.com/t/...uret-s4-s8-uis-7862-headunits-no-fyt.4538107/

    Beside the faked Android 12 Version the head unit seems to be a good bang for the buck. I´ve paid around 230 Euros including VAT and shipping. The unit runs stable and powerful so far. Everything works as expected. The Android is a bit downcutted by the manufactor. There are no text notifications in the statusbar e.g. But i can compensate that with widgets.

    Against the description android auto works wireless with my Xiaomi Mi10t pro. So that's also nice to have.

    Tweaks, mods and others:
    - my wire harness was labeled wrong. Key 2 and Key GND were swapped. So better check the cables before connecting. For me the correct wire names/functions were in the printed manual.

    - replacement fan that fits my model: Sunon MF35101V21000UA99

    - there's a sleep whitelist in the factory settings menu that prevents apps from being killed in standby mode (ignition off). That's very useful. I've whitelisted Google maps e.g. and don't lose my programmed route anymore if i turn off the engine for a short stop.

    - tasker trigger for warm boot: detect any USB device connected. (You have to plug in something into the usb port, dashcam or pendrive e.g.)

    - the status bar only shows a few symbols and no text notifications. Therefore I use a notification widget in combination with nova launcher. This way I can see all notifications in a widget which would be at the status bar originally.

    - wireless ADB is enabled by default with root user. 🎉 The port is 9876. ( I've found that inside the build.prop)

    - if you want to have a look inside the firmware you can use a rom kitchen tool like CBR

    - how to change the boot logo:
    1. If your player is 1280*720 screen, you need to rotate the picture 90 degree, and cut it into 720*1280 size, transform the picture to .BMP format.
    2. If your player is 1024*600 screen, you need to cut the picture to 1024*600 size, transform the picture to .BMP format.
    3. copy the picture into your Udisk root path, and then connect Udisk to the player. follow the steps settings-factory-8888-Logo set-then you can see your picture and select it- click update logo.
    - how to change boot animation: https://forum.xda-developers.com/t/...uis-7862s-not-fyt-based.4525675/post-88086835

    - enhance the microphone and call quality by using the external microphone and disable the internal microphone by masking two pins of a ribbon cable. It's explained inside this thread (link to post will follow)

    - GPS tweak: https://forum.xda-developers.com/t/...uis-7862s-not-fyt-based.4525675/post-88112693

    Known issues:
    - "hey Google" (activate the assistant by hotword) doesn't work
    - no car speed dependent volume control (manufacturer says it would be implemented later)
    - the firmware is a debug release which is a serious security risk (every app or malware can get root access through ADB shell). On the upside you can also get root access through ADB and do everything you want

    To be continued...

    Cheers
    blue_one
    12
    Hi all, if anybody would like to test a very early alpha version of NavRadio(basic), they can find it here:
    Download NavRadio BASIC for QF01

    it's incomplete, full of bugs, it surely crash here and there but still usable.
    I have enabled Google Crashlytics to help me debug all the crash and ANR so more people use it and more i'll fix it.

    The full version will come when the free version will run smootly.
    Enjoy;)


    NOTES:

    - Autoscan is done by MCU and it's fixed to 18 stations. Anyway you can use Autoseek function to find more stations or add new ones to the existing ones.
    - The first frequency at startup need to be fixed.
    - Sometimes you can hear the sound muting for a second, it's because the ROCO service think that navradio is a player and not a radio. I'll look for a fix later on..
    10
    And now a few more!

    1122 / 2211 - both popup a bubble with chinese text. I thought they were the same at first but they have different characters. (They both have the word “log” in it)

    6655 - opens up a screen that appears to be the same as 555666 but these are also in Chinese so I don’t know if there are differences. Notably when you enter this menu with either code it will record a snippet of audio from the mic and play it back.

    4455 - engineer mode (lots of stuff in here to explore, includes adb shell)

    5544 - gps stuff

    1212 - notification that says “slog copied to unkown”

    2121 - seems to just take you home

    45645600 - download mcu file
    9
    How did you discover the codes?
    Just by trying a bunch of different codes and looking for patterns. Starting by looking at the codes we already knew I discovered they are all a repeating sequence of digits that are adjacent to each other on the keypad. Once you find a pattern there’s usually another code that uses the same pattern somewhere else on the keypad. If you actually type in the codes and look at the physical pattern they make you’ll see what I mean. For example 114477 is just the digits in the left column of the keypad going down. 336699 is the same pattern in the right column. And then some codes are just variations on top of that, like doing a code in reverse (which we already knew) as well as adding 00 to the end of some. This is how I discovered all the codes. Once I’d find one code Id try that same pattern in all places and variations. Simple as that! I’m sure there’s more patterns yet to be discovered so try different ideas out and see what you can find. With many people using these strategies I’m sure we can discover more! I may have even missed a few using the patterns of ones I found.
    9
    For whom that's interested and is annoyed that display time is out of sync with atomic network clock time.

    Myself don't use 4G network, but WIFI hotspot from phone.

    Each time when I opened the GPS test app, time changed and was out of sync by 2 to 4 minutes, also when I forgot to put hotspot on my phone on, after that it was taken the GPS time sync by default after startup,
    So first taken my right hotspot network time and changed 30 seconds later to the out of sync GPS time, it was also out of sync with my OEM Opel board computer display.
    With some hassle I could changed that back but needed to be sure that hotspot was always on before starting the car.

    Think I found a solution.

    Note, I don't use sleep mode, always have a fresh cold start, unit starts up with firmware date and time, 09-01-2023, 12:05:54.

    After going in the factory 5544 GPS setting, changed on first tab screen "agps" the server SUPL host to supl.google.com, changed port to 7276 (seems secure port), but you also can leave it on 7275, then tab screen "information", on the bottom page changed the satellites to GPS, Glonass, Galileo, my problem disappeared.

    My unit correctly shows the time now, after a start-up it is in sync within 1 second compared to atomic clock, with or without hotspot, mean also without network connection it syncs with GPS satellites the time correct.
    The AGPS SUPL was using the Chinese host (supl.qxwz.com) and preferred what it looks some Chinese satellites for Glonass and Galileo and somehow the Chinese GPS time is inaccurate.

    Rather Google then the Chinese that follows me ;)