UK M3LR - Netflix, Youtube working over the car connection... Wonder if its a 'luck of the draw' situation?
Did however have a weird once last sunday where Tunein radio was working fine but web browser / youtube died a death, but doing a soft (left/right steering button) reset seemed to kick it into gear.
Annoyingly with the inbuilt sims appearing to not be locally (per country) sourced, but instead uniform 'roaming' for the entirety of Europe (think it might be telefonica but can't recall) there is the annoying consequence of having to combat the browser/youtube from thinking you're outside of the UK (real killer when attempting to use iplayer when at the services charging).
- Simplest workaround to date has been to pop on the phone wifi hotspot and get back on that way.