"Communications satellites allow you to access the internet from your cell phone, or make a call to the other side of the world."
No, that's what towers and undersea fibres do. I work with satellites - they're a right pain when you're trying to use tcp over a bean with a >1sec delay and trying to deliver broadcast quality pictures for the ten, andthey're expensive when you're using a fixed station on the back of a truck, but we only use those from random places in the middle of nowhere where there's no 3G coverage.
99.99% of two-way communication traffic does not pass through a satellite, and tre portion that does keeps decreasing. Even 10 years ago a live video with someone in NZ would probably be bounced off not one, but two satellites, before arriving in London. Now it will take a fibre to singapore and then through Suez to France and into London that way.
Satellites are great at broadcasting to many people, andfor reaching the middle of nowhere where there's limited infrastructure. They aren't a normal means of communication though.