1stRDX?

Want to see if my problem is phone or service related:

Get in RDX with cellphone in pocket and start it up. After a 10-15 seconds I often get a message in the Heads-Up display that states
Call in Progress 1-000-0000
I use the control on the steering wheel to select ‘End Call’ and everything is fine.

Of course, there is no call in progress on my phone – at least I’m not making a call and there is no indication of a call on the phone - or I wouldn’t be posting this.
Doesn’t do it every time. I suspect it may be due to non-standard phone service I use – something called Unreal Mobile (a MVNO - mobile virtual network operator) that uses AT&T.
Got to save money someplace. Or perhaps to some error in the phone/app settings.

Just curious to see if anyone is using a Moto G6 directly with a cell carrier without problems.