Please, correct my essay.

If I had to give up all of my possessions except one, I’d like to keep a cellular phone. The reason is that if had one, I could contact anyone. For example, when disaster like earthquake happens, we need to contact families and friends. In that case, no matter where I would be, I could call and confirm how they are by a cellular phone.
Also, a cellular phone currently has many applications such as television, mail, game and so on. I could confirm the extent of damage by earthquake with news of television even if earthquake would happen. If I felt lonely, I could enjoy playing game of application.