A telephone is an electric tool. Using a telephone, two people who are in different places can talk to each other. Early telephones needed to be connected with wires. Now telephone calls can be sent with radio. This is called wireless or cordless.
Types of telephones [change]
There are many different types of telephone. A telephone that can be carried around is called a mobile phone or cell phone. These became popular in the late 1980s. These days people carry mobile phones and in some cities or countries it is unusual to not have one. Some mobile phones are able to make telephone calls using satellites instead of masts on the ground, which means people can make calls from anywhere in the world.
Most countries have a telephone network. In less developed countries cell phones are used as a cheaper and faster way to bring modern communications to the countryside.
Telephone number [change]
Each telephone has its own number. Today, telephone numbers are about seven to ten digits long. Part of the telephone number is called the area code. Area codes are used to make sure the numbers are not the same in two different places. Each area has their own area code.