Hello
Just wanted to ask a few questions, so managed to get rsap (trial version) to run on my samsung s5. Went to the car and connected it and it began to pull the data through and things like google maps began to work. I connected back to the cars wifi and the phone had internet access. somethings i want to confirm though:

when the Phone is connected like this then I have no way of making a call directly from the handset, it says unregistered network?
When i disconnect then I get a configuration message from my provider (vodaphone) saying something has changed an config needs installing, very annoying
also does not look like it supports 4g though?

I need to confirm I am doing this right?

My car a 61 reg audi q7 with sim slot and mmi.

Sorry for newbie question