Yes the car modem is now working again! Just got back from my dealer. TSB 23-BE-012G Software Update for Dis 2.0 Head Units has been released and is now available. It’s on a USB stick that the dealer has and can install. Not downloadable. Took about 15 minutes. I already had a new head unit installed a few months ago but that did not fix the problem. This TSB restored all services except Google search on the mirror (is that working for any G90?)
Too 8 months but they said it would work and it does. For all those who said the hardware is broken and only 3G, that is incorrect. This is proof.
So all you have a 2017-2019 G90 and you are paying for connected services, it’s all back working again. Many thanks to
@csmaslin for encouraging me to keep on top of this.