It's very useful when your mobile is pay as you go and also has a much larger screen which makes referring to it while driving much safer. You can also use abetterrouteplanner to get better route planning than Tesla's own solution.
Your passenger can use it to find a place to eat while you are driving.
Not everyone, not even every Tesla owner, has an always online mobile.
> It's very useful when your mobile is pay as you go
Hmm, is this a regional thing? Prepaid mobiles here typically have 20GB to "unlimited" (note; not actually unlimited; they'll certainly throttle you if you take the piss) per month data.
> which makes referring to it while driving much safer
Eh? You shouldn't be using it while driving! Does it even work while driving?
> Not everyone, not even every Tesla owner, has an always online mobile.
They might be better spending the money they're spending on data service for their car on data services for their phone...
