Cell phone etiquette

For the first time in a long time I overslept. B woke me up at 6:00. When we left to walk A a few minutes later, the thermometer displayed 7 degrees.

As usual, I am writing this post from the coffee shop. Currently there is a woman sitting across from me talking quietly on her cell and a man sitting next to me talking loudly on his cell. He even ordered his coffee without ending his call which I find rude. I think people should be able to talk on their cell phones wherever they choose even in public places as long as they are not disturbing the people around them. After all, it is completely acceptable to talk with someone in person so what is the difference? But when someone is talking loudly on their cell I find it incredibly annoying.