Маленькое соченение на тему: "Mobile Phone: Are they Expensive toys?

The mobile phone is a small,portable thing that enables people to make phone calls wherever they are.We use it almost every day to communicate with our friends,family and our business partners.In the 1990s, a new network system GSM ,became popular,and more and more people started to use mobile phones.In 2003, there were about 1,52 billion phone users around the world.