I'm guessing the reason you waited 20 minutes is because you know a call isn't a casual form of communication these days. I think people would say the norm shou

I'm guessing the reason you waited 20 minutes is because you know a call isn't a casual form of communication these days. I think people would say the norm should be that after 10 minutes you text the parents. In most case you will get a response sooner and if the didn't pick up you wouldn't be left wondering if something went wrong or they just dont pick up unknown numbers.