What is the reason why the mobile phone can't receive short messages or receive them slowly?

Set the SMS as the maximum storage capacity, and then try to set the storage location of SMS as "mobile phone storage". Try not to use a memory card to store short messages, it will be very slow! ?

Mobile Internet access will also lead to network instability and slow reception.

Basic introduction

A mobile phone, also called a mobile phone, is a kind of mobile phone that can be held in your hand. In the early days, there was also the common name of mobile phone (big brother has a hand in Hong Kong gangster movies), which is a portable telephone terminal that can be widely used. There are two kinds of mobile phones, 2G and 3G, which developed into the 4G era.

source and course

Two bricks are the same size.

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

The first mobile phone in the world was called to an opponent who worked in Bell Laboratories. The other party was also developing a mobile phone at that time, but it has not been successful. Cooper later recalled: "I called him and said,' Joe, I'm talking to you on my mobile phone.' I heard the voice of "gnashing my teeth" on the other end of the phone-although he has always been quite polite. "

Up to now, mobile phones have been born for decades. The products of competition among scientific and technological personnel blossom everywhere, which brings great convenience to our modern life.

Marty cooper is 74 years old. After working in Motorola for 29 years, he founded his own communication technology research company in Silicon Valley. He is the chairman and CEO of this company. Marty cooper's idea at that time was to let the media know that wireless communication, especially small mobile phones, was very valuable. In addition, he also hopes to arouse the interest of the Federal Communications Commission, and AT & amp； t(AT & amp； T is also a big communication company in the United States) and can support the former.

In fact, going back, we will find that the concept of mobile phone appeared as early as 1940s. At that time, the trial production was started by Bell Laboratories, the largest communication company in the United States. 1946, Bell Laboratories manufactured the first so-called mobile phone. But because of its large size, researchers can only put it on the shelf in the laboratory, and people will gradually forget it.

Until the end of 1960s, in&; Two companies, T and Motorola, became interested in this technology. At that time, at & amp； T Rent a large mobile radiotelephone, which customers can install on the truck. At&T Company. T's vision is to develop a mobile phone with the power of 10 watt in the future, and use the radio equipment on the truck to communicate. Cooper thinks this kind of mobile phone is too big and heavy to move and carry. Therefore, Motorola filed an application with the Federal Communications Commission, requesting that the power of mobile communication equipment can only be one watt, and the maximum power cannot exceed three watts. In fact, the maximum radio power of most mobile phones today is only 500 MW.

From 1973 to 1985, the first modern mobile phone was born. It puts the power supply and antenna in a box, weighing 3 kilograms, which is very heavy and inconvenient. Users must carry it like a backpack, so it is called a "shoulder phone".

Similar-looking mobile phones were born in 1987. Compared with the "shoulder phone", it is much lighter and easier to carry. Nevertheless, it still weighs about 750 grams, which is like a big brick compared with the mobile phone that weighs only 60 grams today.

Smaller and smaller mobile phones

Since then, the development of mobile phones has become more and more rapid. 199 1 year, and the weight of the mobile phone is about 250g; 1in the autumn of 996, a mobile phone with a volume of 100 cubic centimeter and a weight of 100 gram appeared. Since then, it has been further miniaturized and lightweight, and 1999 has been lighter than 60 grams. In other words, a mobile phone is not much heavier than an egg.

Modern mobile phones have become more and more like a multi-functional Swiss army knife, except for their smaller mass and volume. In addition to the most basic calling functions, the new mobile phone can also be used to send and receive emails and text messages, surf the Internet, play games, take photos and even watch movies! This was unexpected by the original mobile phone inventor.

Foreign brand

Motorola Corp.

As a veteran communication giant, Motorola's position in the communication industry is beyond doubt. Since Motorola invented the first mobile phone, Motorola has witnessed the whole development history of mobile phones so far. Motorola transponder is used in Apollo 1 1 spacecraft. Motorola has been leading the progress of the times, from the invention of transponder to the world's first commercial mobile phone, the first GSM digital mobile phone, the first two-way pager, the first smart phone, the world's first wireless router and the famous Iridium project. 2011August15th, Google announced that it would acquire Motorola Mobility at a price of 40 USD per share, totaling about 125 billion USD. The boards of directors of both parties have unanimously approved the transaction, and Google's acquisition of Motorola was approved by the European Union and the United States on February 12. 2012 On May 19, the Ministry of Commerce of China issued an announcement, officially approving Google's acquisition of Motorola Mobility, and the acquisition of the world's largest mobile phone manufacturer came to an end. However, on October 30th, 2014,65438/kloc-0, Lenovo acquired Motorola from Google for $2.9 billion.

Nokia (headquartered in Finland)

Nokia was founded in Finland on 1865. After a century and a half of development, it has become the largest mobile phone supplier in the world, and Nokia is the global leader in mobile communication.

Advantages of Nokia mobile phone: humanized operation (S40), complete product line, good quality, beautiful appearance and good photo effect. ? mobile phone

Disadvantages of Nokia mobile phone: the shape is moderate, and the high-end smart phone (Symbian system) has now switched to the embrace of Windows Phone.

Nokia cooperated with Microsoft, and the released WP system mobile phone began to enter the market. Nokia will help promote and define the future of Windows Phone. Nokia will provide Microsoft with expertise in hardware design and language support, and help Windows Phone to enrich its price positioning, gain more market share and enter more regional markets.

Nokia Lumia820 and Lumia920 Beijing time 20 12 September 5 afternoon 10, US Eastern Time September 5, 2002 morning 10, Nokia and Microsoft held a press conference in New York, USA, and officially launched two smart phones with Microsoft Windows Phone 8 operating system-Lumia 820 and Lumia 920.

Orion belt

Samsung, the abbreviation of Samsung Group, the largest enterprise group in South Korea, includes 44 subsidiaries and several other legal entities. It has set up nearly 300 legal entities and offices in nearly 70 countries and regions, with a total staff of 6,543,800+0.96 million, and its business involves many fields such as electronics, finance, machinery and chemistry. As the second largest mobile phone supplier, Samsung has always been a leader in the world communication market. ? mobile phone

Advantages of Samsung mobile phone: rich product line, excellent screen effect and high general configuration.

Disadvantages of Samsung mobile phone: poor expansibility, high price, less functions compared with other mobile phones, high configuration but poor performance (commonly known as vase).

blackberry

Blackberry is a portable wireless communication equipment brand of RIM Communication Company in Canada, which was founded in 1999. It is characterized by supporting wireless information services such as push mail, mobile phone, short message, network fax and web browsing. Newer models also add personal digital assistant functions, such as phone book, calendar and voice communication functions. Most BlackBerry devices have a small and full QWERTY keyboard, which is convenient for users to enter text? .

Advantages of BlackBerry: a complete wireless extension platform for business information, with advanced security functions, ensuring the integrity and confidentiality of information, and easy to deploy, manage and use.

Disadvantages of Blackberry: few software applications and unattractive interface. Roller and trackball are fragile parts, so it is more troublesome to transfer things from computer to mobile phone.