1. The development history of mobile phones not only represents the progress of science and technology, but also proves the development of human civilization.

From analog to GSM, from GSM to GPRS and so on, the invention of every new technology has greatly promoted the development of mobile phones. The development history of mobile phones can be roughly divided into these generations: the first generation (1G), the second generation (2G), the third generation (3G) and the first generation (1g)-analog mobile phones were born in the late 1970s.

Analog mobile phone system mainly adopts analog and frequency division multiple access (FDMA) technologies. AMPS (North American Cellular System), NMT (Nordic Mobile Phone) and TACS (Omni-directional Communication System) are the main analog standards.

Only voice communication can be carried out, the receiving effect and confidentiality are insufficient, and the wireless bandwidth is not fully utilized. The greatest achievement of the first generation wireless network technology is to remove the user line connecting the telephone and the network, so that users can receive and make calls wirelessly anywhere.

Second Generation (2G) At present, the most widely used mobile phones in the world are GSM mobile phones, CDMA mobile phones and PHS mobile phones, collectively referred to as the second generation mobile phones (2G). The second generation system introduced digital radio technology, which provided higher network capacity, improved voice quality and confidentiality, and also introduced seamless international roaming.

Besides voice communication, the second generation system can also send and receive short messages (SMS), multimedia messages (MMS) and WAP. At present, the market labels of the second generation mobile phones in the world are GSM, D-AMPS, PDC and IS-95CDMA.

The third generation (3G) third generation mobile system, namely IMT-2000, is a broadband multimedia system, which can provide high-quality broadband integrated services. The main goal of the third generation mobile phone is to develop a universal wireless communication system, but as a result, many different formats have emerged, including WCDMA, CDMA2000 and TD-SCDMA.

These new standards are based on CDMA (code division multiple access) technology, and have further developed in bandwidth utilization and data communication.

2. The history of mobile phone development1844 May 24th.

Morse's telegram sent the first telegram from Washington to Baltimore in human history. "What a miracle God has created!" " 1On June 2, 875, Bell accidentally spilled sulfuric acid on his leg while doing the experiment. He was in pain and shouted to his colleagues in the other room, "Come and help me!" " This sentence was transmitted to Hotell who answered the phone in another room through the telephone in the experiment, which became the first sentence transmitted by human beings by telephone.

183 1 year, Faraday discovered the phenomenon of electromagnetic induction in England. Maxwell further expounded the research results of Faraday and others with mathematical formulas, and extended the theory of electromagnetic induction to space. More than 60 years later, Hertz confirmed the existence of electromagnetic waves in experiments.

The discovery of electromagnetic waves has become the turning point from "wired communication" to "radio communication" and the origin of the whole mobile communication. As a scientist said, "Mobile phones were born on the shoulders of telegrams and telephones. Wireless communication is impossible without the efforts of predecessors.

"1one day in April, 973, a man stood on the street in new york, pulled out a wireless phone about the size of two bricks and began to speak. This man is marty cooper, the inventor of mobile phone.

At that time, he was an engineer at Motorola. This was the first mobile phone in the world at that time.

1975, the Federal Communications Commission (FCC) of the United States determined the spectrum of land mobile phone communication and large-capacity cellular mobile phone. It is ready for the commercial application of mobile phones.

1979, Japan opened the world's first cellular mobile phone network. 1982, GSM (mobile communication task force) was established in Europe. 1985, the first commercial mobile phone was born.

It puts the power supply and antenna in an example and weighs 3 kilograms. The modern mobile phone was born in 1987.

Its weight is still about 750 grams, which is like a big brick compared with today's mobile phone with only 60 grams. Since then, the "slimming" 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.

3. The development history of 3.Android system combined with network information is summarized as follows:

Android Android is an open source operating system based on Linux. Its company was established in California in 2003. In 2005, it was acquired and funded by Google to establish open handset alliance. On June165438+1October 12, 2007, the Android Beta operating system SDK was officially released.

Android 1.0

Released on September 23rd, 2008, it is also the earliest version of Android system.

With the release of 1.0, the first Android phone equipped with Android 1.0 OS was born. Because 1.0 does not support touch input, G 1 is equipped with a physical keyboard.

Published on April 30, 2009. Since then, Android versions have been named after cakes and sorted alphabetically.

Android 1.6

Published on September 5, 2009/kloc-0. Android 1.6 supports CDMA network for the first time, which opens a door for CDMA operators such as Verizon and Sprint.

Android2.0

1 October 2009,11-about1year after G 1 appeared-Android 2.0 came. In any case, it is the second important milestone in the history of Android development (the first one is Android 1.5).

20 10 released on May 20th. It was not until the release of Android2.2 that Google seemed to seriously consider the enterprise-level features of Android.

2010 65438+released on February 7th. This version began to support NFC. However, for a long time, the function of NFC was limited to scanning NFC notes of scenic spots, so as to obtain more information such as URL and website address—actually, it was no different from QR code, but Google subsequently introduced Google e-wallet into the Sprint version of Nexus S—which was an important mobile payment measure. Now many companies are beginning to notice the prospect of NFC and mobile payment, and there is no doubt that Android2.3 is the pioneer in this respect.

2011released on February 2nd. Honeycomb is more like an attempt to branch the road in the development of Android system. It has nothing to do with smartphones and officially enters the tablet.

20111kloc-0/October 19 released in Hong Kong. Android4.0 is the most significant upgrade in the history of Android development.

Published on June 28th, 20 12. Android4. 1 is a brand-new tablet strategy attempt of Google after Hive.

The story about Android is to be continued. ...

4. The history of the development of smart phones The first generation of smart phones is still in people's memory. After reading so many stories about smart phones, you will definitely ask how smart phones developed step by step.

Then please read on, here is a brief history of the development of smart phones. Speaking of the rise of smart phones, we need to go back to the end of last century.

1at the end of 999, the mobile phone giant Motorola launched a mobile phone called Tiantuo A6 188. Don't underestimate this A6 188, which is the originator of the smart phone in full swing now. A6 188 combines two records: it is the first mobile phone with touch screen in the world and the first mobile phone with Chinese handwriting recognition input.

A6 188 adopts Dragon Ball Ez 16 MHz CPU independently developed by Motorola, supports WAP 1. 1 wireless Internet access, and adopts PPSM (Personal Portable Systems Manager) operating system. Once launched, A6 18 has become the first choice for high-end business people, and we can still occasionally see this legendary mobile phone that has created an era.

A year later, Ericsson from northern Europe launched the R380sc mobile phone. R380sc adopts EPOC operating system based on Symbian platform, and also supports WAP surfing and handwriting recognition input.

As the world's first mobile phone equipped with Symbian OS, R380sc is naturally famous in history. Nokia entered the smartphone market at 200 1 and 1. At that time, Nokia's first PDA phone 9 1 10 was born. Nokia 9 1 10 adopted an embedded CPU produced by AMD, which was developing at a high speed at that time. Its operating system code was GEOS, with 8M storage space built in.

Its appearance once shocked the whole mobile phone industry. It turns out that mobile phones can also have so many functions. A variety of smart phones listed in 2004 announced the rise of smart phones. Motorola A6 188, Ericsson R380sc and Nokia 9 1 10 pioneered the application of smart phones, and the market response was surprisingly good, which made many mobile phone developers eager to move.

So an era of competing to launch their own smart phones came. In February 2002, Motorola made persistent efforts to launch the A388, which is known as the king of the generation. I believe you remember this.

In August, 2002, dopod, a mobile phone manufacturer from Taiwan Province, Bao Dao, China, officially launched the dopod 686. This mobile phone takes the mobile phone that can watch movies as its selling point, uses the powerful Intel Stronarm 206 MHz as its CPU, and the operating system is Microsoft Windows Mobile for Pocket PC 2002 Phone Edition developed by Microsoft. The combination of Intel and Microsoft, two PC giants, doomed the success of dopod 686.

Dopod 686' s powerful function and 4096-color TFT screen make it attract a lot of attention in the market. The listing of dopod 686 shows that smart phones have gradually matured and are ready to launch a general attack on the high-end mobile phone market.

From June 5438 to October 2002 10, the world's first 2.5G smartphone based on Symbian OS was born in Finland. This mobile phone is Nokia 7650. 7650 adopts 4096 color TFT screen and has built-in Bluetooth transmission function, which was extremely rare at that time, and it was also the first mobile phone with built-in digital camera function.

Until today, people still talk about this smart phone that has created many firsts. In June 5438+10, Bird Company launched a PDA mobile phone named "Easy King Three in One".

It takes receiving the stock market data sent by paging network as its selling point and wins the favor of the majority of investors. At the same time, CECT introduced TREO 180 based on Palm OS. TREO adopts 33MHz Dragon Ball VZ processor, 16 gray screen and built-in standard memory 16m. In February, 2002, after the merger of Sony and Ericsson, it launched the Machine Emperor P802 ambitiously.

It attracts many people's attention with its original detachable half-open keyboard. 2002 is a crucial year for the development of smart phones. With the birth of many smart phones, people have realized the extensive operating fields and powerful application functions of smart phones, and mobile phone developers have also seen the extremely broad market prospects of smart phones.

All these have laid the foundation for the overall prosperity of smart phones today. Since then, the launch of smart phones has been out of control, and the records of operating system capacity, CPU speed and memory capacity have been constantly refreshed, and smart phones have ushered in an era of blooming.

At present, smart phones have firmly occupied the high-end mobile phone market. Nowadays, smart phones have steadily entered the mainstream mobile phone market. According to the data in the report released by IDC, an authoritative market research organization at the end of last year, the global mobile phone shipments in the first quarter of 2004, driven by smartphones, increased by 29.3% compared with the same period of last year, reaching 65.438+52.7 million units, among which smartphone shipments surged by 85.8% year-on-year.

At the same time, the report from China shows that in the first quarter of 2004, the total sales volume of smart phones in China reached 655,000, and the total sales reached 65.438+0.94 billion yuan, an increase of 65.438+0.95% over the same period in 2003. The data of these two reports also show that the smartphone market is currently in a period of rapid development.

From the development direction of mobile phone technology, the future 3G technology also determines that smart phones will gradually replace the current traditional mobile phones and dominate the mobile phone world. Smart phone is produced with the development of 3G technology, which is the product of the integration of mobile communication terminal and PC.

Smart phone, as a new thing in 2.5G terminal, is praised by the media as "the stepping stone of 3G mobile phone" and "the touchstone of 3G". Mobile phone manufacturers realize that because there are many similarities between smart phones and 3G mobile phones, the smart phone industry has become a preview for major manufacturers to enter the 3G terminal field, and the breakthrough of smart phone products will become an important foundation and experience for mobile phone developers in the future 3G war.

Now we can see that the ever-changing smart phone is opening the door to the 3G world step by step. However, behind the prosperity, it is difficult to hide the problems encountered in the development of smart phones.

So far, there is no unified operating system standard for smartphones, and smartphones based on different operating systems are almost fragmented, which has seriously affected the scalability of the soil on which smartphones live, and in the long run, the internal friction generated in this area will bring great destructive power. That's right.