I just found this group and wanted to mention a couple of things about the Teyes chinese head unit for those considering getting one. I just returned my unit, Teyes CC3, which was installed in my 2017 Jeep Grand Cherokee. Yes I know that is group is just for the Cherokee but there are a many things that are the same.
Aside from the aesthetic issues (my unit came with an insert that stuck out about two inches) I had the following problems with Teyes:
1. The Wifi kept disconnecting - every time I started my vehicle I had to reconnect my wifi hotspot (turn off and back on). This could be an iphone only problem but it was frustrating.
2. The volume to was too loud - I had to adjust the canbus settings to "All Jeeps" just so I could control it but for many days I had the sound muted and once I figured it out (Teyes customer support did not help) it still was much louder than factory.
3. Voice navigation is limited - Teyes forces you to use their voice navigation system instead of Google's and it is very lacking. Also I believe that you have to register to get this "feature" active permanently.
4. Regular Over-the-air stations did not always come in clear - this was strange, but I found that a couple of the stations that I liked to listen to would sometimes go in and out or would sound fuzzy at times. And yes I did try USA1 and USA2 they did not help and it did not have HD-Radio either.
5. Bad backup Camera image - I used the factory camera on my vehicle instead of the Teyes one that they shipped to me and the image looked over saturated and dark... even the lines looked over saturated.
I appreciate all your concerns but this is kind of why I left the heavy disclaimer about these units are designed for someone that is tech savvy with technical skills that can kind of provide their own technical support when issues arise. Their best suited for tinkers. It really is unfortunate that these units require so much tinkering and are not much more out of the box ready. However their manufacturers in China and that's just how China is
Literally everything you just mentioned is not set in stone and it is changeable in the factory settings you just have to know where to look. I kind of wish you had waited to return your unit but it's not your fault the tech support you talk to on these units is in China in English is their second if not their third language. So they are borderline useless. I used to build computers and motherboards for a living. I have also worked as a programmer so I have a lot of technical skills that most people do not.
Therefore for everyone who wants to buy one of these units who read your concerns I'm going to tell you how to fix them and I will probably make a video on them. Like I said it's kind of sucks you returned your unit because all your issues were fixable.
1) to fix this issue "static Wi-Fi scanning needed to be enabled" you will find this option in the actual Android system developer options. It is disabled by the fault to save battery life on Android devices however since this device is not powered by battery it won't hurt anything to enable it. It is also an absolute must to attach the included 5g Wi-Fi antenna. Without it you will have chronic connection issues. It is marked 5G Wi-Fi. Without it it's the same as not connecting your antennas to your home router you're going to have crappy Wi-Fi
2) to fix this issue under the device sound settings? There's an option called signal boost and it is set to 60 by default. It needs to be turned down to about 52-55. That will fix that issue after that you need to manually tune the DSP. You also have to turn on the factory amplifier in your DSP settings which is disabled by default. Once enabled it drains the base from your speakers and sends it to your subwoofer in the trunk instead. This is only an issue for people with the factory amplifier and 9 speaker sound system.
3) This is highly untrue you need to change the default GPS system to Google Maps under system settings once that's done you can then uninstall their GPS app which I would highly recommend and I did.
4) the radio itself has never been pretty good at least that I have seen.
5) this is once again completely fixable you can we call these settings once the reverse camera is pulled up you tap the screen in the upper right-hand corner and a settings menu appears that allows you to tweak all these settings. I highly agree that it is oversaturated which is why I turned the saturation on mine down from the default 100 to 5. I set the brightness to 13 and the color which is the third setting to 8.
I'm sorry you had all these issues and I wish customer service for the company spoke better English and was able to explain to this to their customers better.
Again I'm sorry you returned your unit but literally every issue you had was fixable and you have convinced me that I need to make a video on this so I am going to do so.
Expect an update to this thread soon where I will post the video. I will cover all these issues and how to fix them and I will also share my manual DSP settings that you can copy. Manual tuning is required and without it it will always sound like crap. Like I said I will provide my manual settings in the video and you can spend roughly 2 to 5 minutes tweaking it to your liking from there or just leave it. Having manual settings as a starting point should cut your tweaking down to about 2 to 5 minutes because I spent an hour manually tuning everything