Huawei P20 no cell data with wifi connected

[Greenfingers]

Hi, my first post, so please be gentle.

I'm having problems connecting my Huawei P20 Pro with the Android Auto MMI box that I just installed in my BMW. The phone is supposed to connect wirelessly to the box, enabling the use of apps on the phone (like Maps) to be displayed on the car's screen. The wireless connection between the two works, but once connected, the internet data shuts off and I get a 'connected to network, but no internet' message. The phone is running EMUI 12 and data roaming is enabled. Mobile data works fine when not connected to wifi. I've tried clearing the cache, enabling wifi+, switching wifi, bluetooth, mobile data, off and on, plus rebooting both units. On a couple of occasions it has worked as it should and I was able to download a map and get a weather forecast, but on the other 50 or so times I tried today, it didn't work.

I would be very grateful for any help.

 

[Greenfingers]

Today I read that in order to use Android Auto on a phone with EMUI 12, you need to go via Google Assistant. Having tried that, I don't see how it's possible - is that right?

 

[Bla1ze]

Seems like with the P20 Pro you're going to run into issues possibly w/o much resolution because of the Android version it's on -

https://www.reddit.com/r/AndroidAuto/comments/lefpbv

Do you have another device to do some testing with? I'm guessing any device with a new version of Android would work better.

 

[Greenfingers]

Thanks for the suggestions. The screen resolution seems okay with the option ticked for the MMI box to negotiate res with the phone.

That link is interesting, because my Huawei appears to be doing the same as the Xiaomi.

I have tried a Moto G6 phone running EMUI 9 through a USB cable and the resolution is poor and distorted. Also briefly tried another phone running 11, but had similar connection issues; perhaps that could be resolved, but I really wanted a solution for my P20 and it sounds like any Android 12 phone is going to have the same problem.

Why would the manufacturers introduce a backward step like that?

 

[mustang7757]

Isn't Huawei ban from using Google service?
You would have to side load Google application to make them work?

 

[Greenfingers]

Oh, I hadn't thought of that!

Yes, maybe it's something to do with spygate, although it's a bit weird that the phone came preloaded with Android Auto, which itself it basically a load of Google apps.

 

[Greenfingers]

And it definitely works in factory spec through a USB cable.

 

[mustang7757]

Possible right around the p20 that started happening if I remember correctly so possible it had some Google services but not 100 percent.

 

[rvbfan]

If that's the case, it likely won't ever update to newer versions.

 

[rvbfan]

If that's the case, it likely won't ever update to newer versions.

 

[Greenfingers]

Wasn't that ban only introduced in the USA? I'm in the UK, so don't think it applies here.

 

[rvbfan]

The UK being an ally of the US I'd think it would.

 

[Greenfingers]

No, that can't be right - my P20 came with Play Store preloaded and I'm using Google maps, Gmail and so on.

So the conflict when connecting via wifi that prevents the use of mobile data (even when it is activated) is an Android 12 thing? Surely this must have come up millions of times with people using Android 12 phones and Android Auto? I just don't get it.

 

[Laura Knotek]

@dangerousfen aren't you from the UK and use either Huawei or Xiaomi?

 

[Laura Knotek]

I'm not sure about phones, but telecoms cannot use Huawei equipment in the UK going forward. https://www.gov.uk/government/news/... removed,broadband and mobile operators today.

 

[NerdyGreenWitch]

If you are in the US, Google and all the other tech companies are forbidden to do business with Huawei because of spygate. That’s why it runs its own OS rather than regular Android.

 

[Greenfingers]

I'm in the UK. There is no ban on Huawei cell phones here - that only applies to their equipment in the 5G network infrastructure.

 

[dangerousfen]

@dangerousfen aren't you from the UK and use either Huawei or Xiaomi?

Yes Laura, I'm in the UK and use a Xiaomi phone but Xiaomi have never been subject to any ban on using Google services.