Mobile phones are very popular in Britain. Over forty million people have one. Teenagers use them a lot, and texting has created a new language with abbreviations like 'How RU?' However, there are problems. Mobiles can be expensive, and some scientists think radiation from mobiles may be harmful. Psychologists say we are becoming dependent on them. A big problem is crime β many teenagers have had their phones stolen. Radio has a long history. The BBC started in 1922. During World War II, Winston Churchill gave important speeches on the radio. In the 1960s, TV became more popular, but radio survived. Today, 91% of people listen regularly, and you can also listen to radio stations online.