Mobile Communication Etiquette

▶The case in the train
I don't mind people use cellphone to send emails. But, it is often said that calling in the train is a bad manner, and I don't like it, either. Although some people sometimes talk with their friends in a loud voice, i hate to call on the phone in the train even if the voice is weaker. I don't know why but I don't like to see someone calling.

▶The case in the theater
Although I don't mind sending emails in the train, I think the theater is the special place. I hate someone opens the cellphone. The bright lights prevented me from concentrating the plays. I like plays very much, so I really hate using cellphone.