My first trainer was a 75 year old woman who taught me the art of learning truck while holding conversations about anything but truck training. If I missed a gear she'd just casually put it back in gear and keep her story going. Great times.
Yes There is a selector in some trucks to do a lights test. Switch it on, get out of truck and inspect. Built in cellphone? Never heard of this. There is built in software on the truck, but it's not really any different from modern cars being built. Yes and yes. Selector lever for activating jake. It is manual. No idea on the last.