[MTCB Android Head Units General] talroot:
Yes, I enjoy the unit and overall it works pretty good. It's frustrating trying to communicate with Joying tech support. They are responsive and try to help but I don't think they understand very well what the issue is. They're trying to pinpoint things I'm doing to the unit to cause the problems instead of acknowledging there might be an issue with the software. They advise me to check the red and yellow pair of wires and be sure they're paired correctly with the ISO harness. This is understandable as the unit wouldn't have voltage after key off, but my wires are paired and soldered correctly. Then they ask me how I'm manually rebooting the unit and this happens when you make a change under factory settings that require a reboot. Changing the "wheel" option reverses the movement inputs on the volume know and this requires a reboot. Changing the gain outputs to the RCAs so I don't have to crank my amp up all the way requires a reboot. If you hold down the power button to go in recovery, don't make changes, reboot, data is lost. Then they wonder why I went into recovery and what I did there even though I said I didn't make any changes. I tell them I update the apps on the unit via playstore and I'd like to reboot to refresh the OS. They tell me to only install apps from the playstore! Bottom line is, the unit loses some settings when rebooted and they don't seem to understand this. What I don't understand is it's not happening to everyone evidently, so what's different on ours? Maybe we should reflash the OS? Mines done it from the start and I have applied the updates but it still happens. Here is the last couple of exchanges of my help email.. I'm not getting anywhere. Any ideas?

On Wed, Mar 9, 2016 at 10:24 AM, Joying auto parts manufacturer <carjoying@gmail.com> wrote:

Hi Ryan,

Thank you for your explain.

How the head unit is reboot manually?

And why did you manual to reboot it?

Any more questions please feel free to let me know.

Have a nice day.

Best regards,

Rambo

On Thu, Mar 10, 2016 at 1:06 AM, Ryan wrote:

I've accidentally entered recovery by holding down the power button trying to shut off the unit. After noticing what I did, I exited recovery without making changes and data was still lost. Along with the lost data, the clock resets to 24-hour format as well. After installing apps from the playstore, I'd to reboot the unit like I do my android phone without turning having to turn the vehicle off.

On Mar 10, 2016 2:57 AM, "Joying auto parts manufacturer" <carjoying@gmail.com> wrote:

Hi Ryan,

Thank you fo ryour explain.

I advice you please install you need apps from Google play store, then set the right time is OK.

Any more questions please feel free to let me know.

Have a nice day.

Best regards,

Rambo

On Thu, Mar 10, 2016 at 8:15 PM, Ryan wrote:

Hello the apps are installed from the playstore but when i reboot the unit data is still lost and clock format reset. I'll continue testing to try and fine the issue. Others at xda forums have the same problem too. Thanks.

Ryan

Hi Ryan,

Thank you for your feedback.

I advice you please using JOying defualt app, because we adjust and write the software to Joying stereo.

Some apps doesn't can compatible with joying head unit, because is not optimizing the head unit.

Any more questions please feel free to let me know.

Have a nice day.

Best regards,

Rambo