You don't. You're free to use iPhone all day for work and play.
>What are you actually imagining doing with these models in the car?
The exact same things that are done on a laptop and desktop.
You just said "The screen size is too small" when geor9e was talking about using the phone so I'm confused is a phone too small or just fine for this?
> The exact same things that are done on a laptop and desktop.
i.e. Not things people usually do in cars...