Mobile phones, called mobile phones or wireless phones, are usually called mobile phones. At first, they were just a communication tool. Commonly known as "mobile phone" in the early days? [1], a portable telephone terminal that can be widely used, was first developed from the battlefield mobile phone manufactured by Bell Laboratories in 1940. 1958, Soviet engineer Leonid Kupriyan Norwich invented лк- 1 mobile phone. 1973, Motorola engineer marty cooper invented the world's first commercial mobile phone. Mobile communication has experienced the 2G era and 3G era, and has developed to the 4G era so far, followed by the 5G era, and the commercialization of 5G has appeared in China.

Advantages of mobile phones:

1. The biggest experience for users is very convenient, such as navigation, making phone calls, texting and video chatting.

Mobile phone can satisfy everyone's daily communication, whether it's entertainment or work and study.

3. The mobile phone has positioning function, which can provide the specific location in time when an accident occurs.

You can download the learning software at any time on your mobile phone, and you can learn wherever you go.

Mobile phones can also surf the Internet, pay attention to news and broaden their horizons.

6. The entertainment software of mobile phone can provide more entertainment channels for everyone and make their spare time more comfortable.

7. You can relax through your mobile phone, listening to music, following the drama, etc.

8. There are many auxiliary functions of mobile phones, such as alarm clock, memo reminder, SMS and so on.

9. Mobile phones have brought everyone into the era of handheld intelligence.

10. Take videos and photos, and record the wonderful moments in life at any time.

Disadvantages of mobile phones:

1. The mobile phone can easily bring you the psychology of comparison.

2. People with poor safety awareness may be misled by some opinions on the Internet.

There are all kinds of messages on the mobile phone, which bring different influences.

4. Games on mobile phones will affect students' study.

5. Too much mobile entertainment will indirectly affect people's life, office and study.

6. Watching mobile phones often can lead to myopia and damage vision.

7. The mobile phone itself has radiation, which has an impact on the body for a long time.

8. Dependent, never start work on the problems solved by the opponent's function.

9. The mobile phone is bound with personal funds and personal information, and once it is lost, there is a risk of leakage.

10. The temptation of mobile phones is too great, and people with weak self-control will be addicted to it.

How to use mobile phones reasonably?

1, don't play with your mobile phone while eating.

Don't touch your mobile phone in class.

3. Try to play mobile phones as little as possible after class.

4. Eat at home and talk to your parents. Don't touch your mobile phone.

5. Don't touch the mobile phone after turning off the lights.

6. Be active with classmates, and don't play with your mobile phone when talking to the teacher.

7. Don't cheat with your mobile phone.

8. Don't use your mobile phone to cause all kinds of troubles.

9. Don't use your mobile phone to do illegal and criminal things.

10, use your mobile phone well in your study.