Can I reply automatically when the phone is turned off?

Mobile phone is a kind of portable telephone terminal which can be widely used. It is called a mobile phone or a wireless phone. At first, it was just a communication tool. It was commonly known as "mobile phone" in China in the early days.

The mobile phone was first developed from the battlefield mobile phone manufactured by Bell Laboratories in 1940. Later, marty cooper, an American Motorola engineer, invented the first commercial mobile phone in the world in 1973. In addition to typical telephone functions, modern mobile phones include more functions, such as cameras, GPS and Internet connection, which are collectively called smart phones.

1one day in April, 973, a man stood on the street of new york, took out a wireless phone the size of two bricks and made a phone call, which attracted passers-by to stop and stare at him. This man is marty cooper, the inventor of the mobile phone. At that time, Cooper was an engineer and technician of the famous Motorola company in the United States.

The so-called second generation mobile phone (2G) is the most widely used in the world, mainly based on GSM in Europe and CDMA in the United States. They are all digital, which can not only communicate by voice, but also send and receive short messages and wireless application protocols.