It's more aversion to your device suddenly making a phone call that you didn't expect it to make.

Like, say you're trying to make this reservation while you're having a poop in a public restroom. You might have no problem calling to make a reservation when you're in a more appropriate environment and you have all the information at hand. But, you might not want to unexpectedly have to talk to them while you're grunting and pushing out a turd.