Chinese pinyin: shǒu jī:.
English: mobile phone, mobile phone
Additional Notes: Handheld phones, combined devices and mobile phones.
Short for hand-held mobile phone.
[Edit this paragraph] Introduction
Mobile phones, usually called mobile phones, are commonly called mobile phones and flashlights in Japanese, Hongkong and Taiwan Province areas, and were also called mobile phones in the early days. They are portable telephone terminals that can be widely used.
At present, the so-called second generation mobile phones (2G) are the most widely used in the world, mainly GSM and CDMA. They are all in digital format. Besides voice communication, they can also send and receive short messages (SMS), multimedia messages (MMS) and wireless application protocol (WAP). GSM is the most popular in Chinese mainland and Taiwan Province province, and CDMA and PHS mobile phones are also very popular. At present, the whole industry is in the process of migrating to the third generation mobile phone (3G).
Generally, the appearance of a mobile phone should include at least one LCD screen and a set of buttons (some touch-screen phones reduce buttons).
In addition to typical telephone functions, some mobile phones also include PDA, game machine, MP3, camera, photography, recording, GPS and other functions, and there is a trend to develop to PDA with mobile phone functions.
The microphone and earphone of the telephone and the corresponding microphone and receiver are all installed on one handle. Formerly known as mobile phones, handheld devices and mobile phones, they are portable telephone terminals that can move in a large range.
[Edit this paragraph] Development history
1G
The first generation of mobile phones (1G) refers to analog mobile phones, which appeared in Hong Kong, the United States and other film and television works in the 1980s and 1990s. The first person to develop a mobile phone was Dr. Cooper from Motorola, USA. Due to the limitation of battery capacity and the development of analog modulation technology, such as huge antenna and integrated circuit, this mobile phone has a square appearance and can only be moved, but not portable. Many people call this kind of mobile phone "brick" or "Black King Kong".
There are many formats of this kind of mobile phone, such as NMT, AMPS, TACS, etc., but frequency division multiplexing can only be used for voice communication, with unstable reception effect, insufficient confidentiality and insufficient wireless bandwidth. In this case, the mobile phone is similar to a simple radio duplex station, the call is locked on a certain frequency, and you can use FM radio to eavesdrop on the call.
2G
The second generation mobile phone (2G) is also the most common mobile phone. Usually, these mobile phones use very mature standards such as PHS, GSM or CDMA, with stable call quality and appropriate standby time. In the second generation, in order to meet the needs of data communication, some intermediate standards are also supported on mobile phones, such as GPRS supporting MMS service, WAP service for Internet service, and various Java programs.
third generation
3G, the abbreviation of English 3rdGeneration, refers to the third generation mobile communication technology. Compared with the first generation of analog mobile phones (1G) and the second generation of GSM, CDMA and other digital mobile phones (2G), the third generation of mobile phones generally refers to a new generation of mobile communication systems that combine wireless communication with multimedia communication such as the Internet. It can handle images, music, video streams and other media forms, and provide a variety of information services including web browsing, teleconference, e-commerce and so on. In order to provide this service, the wireless network must be able to support different data transmission speeds, that is, in indoor, outdoor and driving environments, it can support at least 2Mbps (megabits per second), 384kbps (kilobytes per second) and 144kbps respectively.
3G mobile
Compared with the first generation of analog mobile phones (1G) and the second generation of GSM, TDMA and other digital mobile phones (2G), 3G communication has many names, which are defined by ITU as "IMT-2000" (International Mobile Phone 2000) and called "UMTS" by European telecom giants.
At present, there are three international standards for 3G mobile phones: WCDMA in Europe, CDMA2000 in the United States and TD-SCDMA proposed by scientists in China.
Now, "3G communication" is about to become the mantra in people's mouths. The so-called 3G, in fact, is the third generation, which means the third generation digital communication in Chinese. 1995, the first generation of digital mobile phones, can only make voice calls; The second generation digital mobile phones from 1996 to 1997 have added the function of receiving data, such as accepting emails or web pages; The main difference between the third generation and the first two generations is that the speed of transmitting sound and data has increased. It can handle various media forms, such as images, music and video streams, and provide various information services, including web browsing, teleconference and e-commerce. Compared with the first generation analog mobile phones (1G) and the second generation digital mobile phones (2G) such as GSM and TDMA, 3G communication has many names, which are defined by ITU as "IMT-2000" (International Mobile Phone 2000) and called "UMTS" universal mobile telecommunications system by European telecom giants. According to the standard, when the mobile terminal moves at vehicle speed, its data transmission rate is 144kbps, the outdoor stationary or walking speed is 384kbps, and the indoor speed is 2Mbps. However, these requirements do not mean that the available rate of users can reach 2Mbps, because the indoor rate will also depend on the detailed frequency planning in the building and the close cooperation between organizations and operators.
Future mobile phone
Future mobile phones will focus on security and data communication. On the one hand, strengthening the protection of personal privacy, on the other hand, strengthening the research and development of data services will introduce more multimedia functions. Mobile phones will have more computing power and become personal information terminals, not just the functions of calling and short messages.
Mobile phones will be more intelligent, miniaturized, safe and multifunctional.
Current mobile phone
At present, the most widely used mobile phones in the world are GSM and CDMA. In Chinese mainland and Taiwan Province Province, GSM is the most popular, and CDMA and PHS mobile phones are also very popular. These are the so-called second generation mobile phones (2G). They are all in digital format. Besides voice communication, they can also send and receive short messages (SMS), multimedia messages (technology) and wireless application protocol (WAP).
[Edit this paragraph] Mobile phone type
As the name implies, mobile phone type refers to the external type of mobile phone. At present, the commonly used classification is to divide mobile phones into folding (single screen, double screen), upright, sliding, rotary and so on.
Single screen folding
Folding mobile phone means that the mobile phone is clamshell, and the main display screen or buttons can only be seen when the cover is opened, and there is only one screen, so this kind of mobile phone is called single-screen clamshell mobile phone. At present, there is also a dual-screen flip phone on the market, that is, there is an auxiliary display screen on the flip, which is usually relatively small and can generally display functions such as time, signal, battery and incoming number.
vertical
Vertical mobile phone means that the screen and buttons of the mobile phone are on the same plane, and the mobile phone has no flip cover. The main feature of upright mobile phone is that it can directly see the content displayed on the screen.
Sliding cover type
Sliding the mobile phone mainly means that the mobile phone can only see the whole body when it is pulled. Some models can only see the keys by sliding the lower cover; Others can only see the keyboard by pulling up the screen part. To some extent, the slide phone is an extension and innovation of the flip phone.
Watch style
Watch-type mobile phones are mainly mobile phones that are held in your hand like watches. Its design is compact and its function is the same as that of ordinary mobile phones.
rotary type
Similar to the slide type, the most important thing is that you can see the keyboard after180 rotation.
[Edit this paragraph] Mobile phone type
Business mobile phone
Business mobile phone, as its name implies, is a mobile phone product with business people or people working in state organs and units as the target user group. Business mobile phones are popular because of their powerful functions. Industry experts pointed out: "A good business mobile phone should not only help users achieve fast and smooth communication, but also complete business activities efficiently."
camera cell phone
A camera phone is a kind of mobile phone, that is, a mobile phone with built-in camera function. The first camera phone in the world was J-SH04 made by Sharp Corporation of Japan in June 5438+065438+ 10, 2000. As expected, this camera phone uses CMOS image sensing module (referred to as CMOS), because CMOS is more power-saving than CCD image sensing module used in digital cameras at that time. Let the battery of the mobile phone not run out quickly because of using the camera.
Mobile phone for the elderly
With the improvement of people's health level and the extension of population life, the proportion of the elderly in the population is increasing. The elderly, who account for nearly one third of the population, need their own mobile phones, which is simple to operate. After Celot first launched the mobile phone for the elderly, many manufacturers followed suit and developed their own brands of mobile phones for the elderly.
Practical functions: big screen, big font, big ringtone, big buttons, Datong voice;
Convenient life: professional software (visual, simple menu, clear structure), one-button dialing, banknote inspection, flashlight, hearing aid, phone book reading, SMS reading, incoming call reading, dialing reading)
Not only that, it also has the function of improving the quality of life of the elderly: playing radio, Beijing opera and drama, pressing the distress button (after pressing the button, it makes a high-decibel distress tone, and at the same time dials the distress phone to send distress information to the designated number. ), daily recipes (preferably online download updates), grocery list.
Music mobile phone
Music mobile phone, in fact, is in addition to the basic functions of mobile phone (making phone calls, sending text messages, etc. ), it pays more attention to the music playing function. It is characterized by good sound quality, lasting music playing time and shortcut keys for music playing. At present, the better music mobile phones are Nokia XM series and Sony Ericsson WALKMAN series, and other brands have also set foot in this kind of mobile phones.
Game mobile phone
Game mobile phone, that is, mobile phone with more emphasis on game function. The feature is that there are buttons specially set for games or buttons convenient for games on the fuselage, and the screen is generally not small. For example, Nokia N-GAGE platform mobile phone (Nokia N8 1).
contact number
Invisible mobile phone is a kind of high-end intelligent handheld computer mobile phone. Besides its super business function and Lian Bi handwriting, as the name implies, its "invisible" function is the most sought after. The so-called "invisibility", first, phone calls and short messages can be answered and received at will, and those who don't want to answer and receive are filtered out. Second, except the owner himself, no one can see the text messages sent and received, and can't see the call records. Third, important business cards are automatically hidden. The worst thing is not simply an invisible problem, but that others simply can't know whether there are calls, text messages and important business cards. With this mobile phone, even if it is lost, there is no danger of revealing important personal information.
smartphone
Smart phone is a simple formula of "1+1=" PDA+mobile phone = smart phone ". Broadly speaking, smart phone not only has the function of talking on mobile phone, but also has most functions of PDA, especially personal information management based on wireless data communication, browser and email functions. Smart phones provide users with enough screen size and bandwidth, which is not only convenient to carry around, but also provides a broad stage for software operation and content services. Many value-added services can be introduced in this respect, such as: stock, news, weather, transportation, goods, application download, music and picture download, etc. 3C (computer, communication, consumption) smart phone will surely become the new direction of mobile phone development in the future.
Several prerequisites for smart phones:
1, which has all the functions of an ordinary mobile phone, and can be used for normal mobile phone applications such as calling and texting.
2. Have wireless Internet access capability, that is, support GPRS under GSM network or CDMA 1X, wifi or 3G network under CDMA network.
3. It has the functions of PDA, including PIM (Personal Information Management), schedule, task arrangement, multimedia application and web browsing.
4. Have an open operating system. On this operating system platform, more applications can be installed, so that the functions of smart phones can be expanded infinitely.
operating system
▼Symbian OS: Because it is popular, it is fashionable and has the widest range of support, and it goes further and further.
Symbian's current design is reasonable and stable, supported by many manufacturers, and has a bright future. Now its network application is very powerful. 9-key one-handed operation is very comfortable. There are basically no shortcomings. Symbian is very similar to the combination of Windows and Linux. It has a good interface, adopts the technology of separating the kernel from the interface, has low requirements on hardware, and supports C++, VB and J2ME. Representative models: Nokia N95, Nokia E90, Nokia N96 and so on.
▼WM: It is Microsoft's software platform for Pocket PC and smart phones. Windows Mobile extends the familiar Windows desktop to personal devices.
Windows Mobile is Microsoft's "mobile version of Windows" for handheld devices. The devices using Windows Mobile operating system mainly include mobile phones, PDA's and portable music players. Windows Mobile has four operating systems, namely Windows Mobile for Pocket PC Edition, Windows Mobile for Pocket PC Phone Edition, Windows Mobile for Smartphone Editon and Windows Mobile for Portable Media Centers. The latest version is Windows Mobile 6. 1. Advantages: 1, the interface is similar to Windows on the desktop, which is convenient for people familiar with computers to operate. 2. Rich pre-installed software, built-in Office Word, Excel, Power Point, browsing and even editing, built-in ie browser and media player. 3, computer synchronization is very convenient, fully compatible with Outlook, Office Word, Excel, etc. 4. Multimedia is powerful. With the help of third-party software, audio and video files in almost any mainstream format can be played. 5, touch operation, comparable to iPhone. 6. Extremely rich third-party software, especially dictionaries and satellite navigation software, can run. Disadvantages: 1, which is more complicated for people who are not familiar with computers. 2. At present, the maximum pixel of this camera is 5 million pixels (Samsung I900, 2008). 3, the hardware requirements are higher. 4, the volume is slightly larger, and many operations require the help of a stylus. The mainstream hardware configuration of Windows Mobile handheld computers and mobile phones: CPU: 195-624 Mhz, Main chip manufacturers: Intel, Texas Instruments, Samsung, Qualcomm, etc. Memory: 64- 128MB Ram (for program running), 128-256MB Rom (for storing third-party programs and user files), display screen: 240x320 or 480x640, 65000 colors, 2. SDHC, high-end models with built-in WiFi wireless network receiving module, GPS satellite receiving module, FM radio receiving module, 3G or 3.5G high-speed network HTC Diamond launched on May 6, 2008 is the flagship model of Windows Mobile, which has caused a sensation in the field of mobile phones and mobile devices. Its momentum is almost equal to that of iPhone, and its main performances are as follows: Windows Mobile 6.1professional, CPU: Qualcomm 524 MHz, 128 MB Ram, 256 MB Rom, 4 GB internal storage, 7.2Mb/s HSDPA 3.5G high-speed network access, 2.8-inch VGA display, WiFi, GPS satellite receiver, FM radio, Bluetooth 2.0 port, 3-megapixel camera, flash, 3D picture display, Micro SD memory card.
▼Linux: Give you a reason to love it, lack of security and low performance.
Linux has many advantages, such as open source code, low cost of software licensing, rich human resources for application development and convenient development of personal and industrial applications. Starting too late, there is no solid foundation. Representative models: Motorola A760, Samsung i5 19.
▼Palm OS: Please look at me again. There are very few users with single function.
Palm, this system does not require high hardware, so it can be well controlled in price and consumes little power. The remarkable feature is that the speed is much faster than other systems and the operation is comfortable. If it doesn't work, the stability is not good (it's good to be familiar with it). But there are few people in China, and there are few people writing software for it in China. The network application is also poor. Representative model: Samsung SGH-i500Treo 600.
[Edit this paragraph] Mobile phone brand
Europe and America mobile phone
Nokia, Sony Ericsson, Motorola, Philips, Palm, Hewlett-Packard, Apple, Blackberry, Disney, Alcatel, O2, i-mate, Vertu, mobiado, Ericsson, Siemens, Sachim, Lucent and Google.
Japan and Korea mobile phone
NEC, SK, Sharp, Pantech, Kyocera, Weikai, Panasonic, Dongfang Long, Mitsubishi, Toshiba, Sanyo, Sony Ericsson, Hyundai, Samsung, LG,
Domestic mobile phone
Dopod, Lenovo, Celeste, Bird, Qixi, Amoi, Konka, TCL, Haier, BBK, Shenda, Asus, BenQ, Coolpad, OKWAP, Huawei, UT Starcom, ZTE, Hisense, OPPO, Skyworth, Youlitong, GT Tong Jia, CECT Gigabyte Tian, Long Aiken and ZTC Zhongtian. , Protrude, HKC, Zhao Xun, Da Yujun's deep love, Gosbell, Yi Chengyou, Cinda, Zhongheng, Lianchuang, Zhongqiao, Kono, Intimate, Asynda, Tianyuan, New Post, Mingteng, Kejian, Xoceco, Panda, Southern Hi-Tech, Datang, Topdibit, Inspur, Zhongqiao Digital Source and Ziguang.
Ganghang mobile phone
Many friends have some misunderstandings about the concept of "Hong Kong version of mobile phone", thinking that the Hong Kong version of mobile phone is fake and has quality problems. Hong Kong mobile phones are aimed at the Hong Kong market, and these products have formal sales methods and channels in Hong Kong. Hong Kong licensed goods are not fakes. When it comes to the word "Hong Kong licensed goods", some friends may feel scared and always feel that Hong Kong licensed goods are not reliable. On the contrary, Hong Kong licensed products are genuine compared with domestic licensed products. Because it is manufactured by the original factory, you don't have to worry about the hardware at all. The operation and function are the same as those of domestic licensed products. However, due to the tariff differences between the Mainland and Hong Kong, and the pricing of manufacturers in the Mainland and Hong Kong are also different. Even the mobile phones officially sold in Hongkong are quite different from those of the same model in Chinese mainland. However, some mobile phone manufacturers have in one way or another transferred products that should be sold in Hong Kong to the mainland for sale and smuggled them directly back to Shenzhen from Hong Kong. Therefore, licensed mobile phones in Hong Kong have the labels of specialty stores and Hong Kong mobile operators on the back.
Supplement: Hong Kong mobile phones are actually divided into licensed and parallel imports. Mobile phones purchased in regular Hong Kong electrical chain stores (such as Gome, Fengze and Broadway) will be invoiced by sellers. These mobile phones are only called licensed in Hong Kong and enjoy customer service and after-sales services provided by manufacturers (such as Nokia, Motorcycle and Samsung), such as one-year warranty. Some also offer a national warranty. However, the Hong Kong water mobile phone bought in a parallel store in Hong Kong has no formal invoice, and it can't enjoy customer service and after-sales service in Hong Kong, so it can only be repaired at the place of purchase. Due to the warranty, there is still a big difference between the prices of Hong Kong banks and Hong Kong waters.
In fact, mainland mobile phones are very cheap because of the competition of domestic products. There is basically no price difference between domestic China banks and Hongkong banks, and even China banks are cheaper.
In China, many merchants use port water as a Hong Kong bank, which is actually very unkind, because no matter where they take it, there will be no guarantee.
The way to distinguish between Hong Kong banks and Hong Kong waters is actually very simple: Hong Kong licensed charger plugs all use British tripods (three feet, each side), while Hong Kong waters have everything and colors.
Do Hong Kong mobile phones have simplified Chinese?
Generally speaking, licensed mobile phones in Hong Kong are traditional mobile phones and simplified Chinese, which is the same as domestic licensed mobile phones (except that some models of manufacturers do not have simplified Chinese). If the menu is in English or other languages, the relative price will be cheaper.
Hong Kong Mobile Phone Warranty:
Hong Kong mobile phone is guaranteed for one year in Hong Kong.
[Edit this paragraph] Related terms
roam
Roaming is a term commonly used by mobile phone users. It means that users of cellular mobile phones can continue to use their mobile phones in other regions or countries when they leave their own regions or countries.
Roaming can only be carried out between domestic cities with compatible network standards and connected networks or between regions or countries that have signed bilateral roaming agreements. It is technically quite complicated to realize roaming function. First of all, the location of users should be recorded, and there should be a set of profit settlement methods between operating companies.
Sim card
Also known as subscriber identity card, it is a data card of digital mobile phone, which records the identity and key of the user, and can be used for GSM system to identify the identity of the user and encrypt the voice information of the user. SIM card can effectively prevent theft, parallel connection and voice information eavesdropping.
SIM cards are divided into large and small cards, which have exactly the same functions and are suitable for different types of digital mobile phones. Only when the SIM card is installed can you use the mobile phone. SIM card can be inserted into any mobile phone of the same type, and the call charges will be automatically included in the cardholder's bill.
General packet radio service
GPRS is the abbreviation of "General Packet Radio Service". It is a new network superimposed on the existing GSM network. It makes full use of the existing mobile communication network equipment, adds some hardware equipment and software upgrades to the GSM network, and forms a new network logical entity. Based on packet switching technology and IP data network protocol, it makes the data service of existing GSM network break through the limit of 9.6 kbit/s, and the highest data rate can reach 170 kbit/s, which is more than enough for most mobile users. Users can use various high-speed data services in mobile state through GPRS, including IP service functions, such as sending and receiving e-mails, Internet browsing, etc.
dual sim dual standby
Dual card dual standby refers to a mobile phone, which can hold two SIM cards at the same time, and both cards are in standby state. Dual-card dual standby in the market generally refers to dual-card dual standby of the same network standard, that is, GSM network dual-card dual standby, CDMA network dual-card dual standby, PHS network dual-card dual standby; Dual card dual standby mainly refers to the first case, namely GSM dual card dual standby. At present, there are few or no dual-card dual-standby mobile phones in CDMA and PHS systems on the market.
USIM card
USIM card is the third generation mobile phone card. Many people think that in the 3G era, most applications can only be realized by mobile phones, and the limited resources on the card only need to realize the authentication function. Indeed, the application of 3G is very complicated, and most of the applications can not be completed by STK card alone. However, the USIM card can't only do simple authentication function. As it turns out, it is gradually transitioning to the mobile commerce platform, and even the final multi-application platform. It is no longer difficult to realize other applications such as electronic wallet, electronic credit card and electronic bill on mobile phone. This feature makes USIM card a medium for cross-field cooperation and mutual penetration among different industries, for example, banks can participate in the operation of telecommunications, and vice versa.
In addition to supporting a variety of applications, the USIM card has also upgraded its algorithm in terms of security, adding the card's authentication function to the network. This two-way authentication can effectively prevent hackers from attacking the card. At the same time, the phone book function of USIM card is more powerful, which can store up to 500 phone numbers, and for each phone, users can also choose whether to input other information, such as e-mail, aliases, other numbers, etc.
Despite stumbling, 3G is coming to us step by step. High 3G license fees may be one of the reasons why many operators are hesitant, and more importantly, they hold a wait-and-see attitude towards 3G applications. Moreover, there are still many problems to be solved urgently to realize multi-application based on USIM card, such as imperfect related specifications, lack of mobile phones to support this multi-application, and more importantly, the multi-party coordination between operators and related enterprises or government agencies has increased the difficulty of this application. In any case, the third generation mobile communication card has made technical preparations in this respect, and I believe that multi-applications based on USIM cards will eventually be widely used in the 3G era.
[Edit this paragraph] Mobile phone-first aid maintenance
Mobile phones are carried around every day, and the usage rate is high. In case of accident or premature deterioration of function, they are relatively higher than any electrical products in your home. It is certainly the best way to deal with the symptoms such as accidental water inflow and accidental fall of mobile phones, which lead to intermittent automatic shutdown. However, if you have some basic knowledge of mobile phone first aid, you can recover the loss and save the life of the mobile phone.
Rescue the flooded mobile phone.
The mobile phone was wet by the rain and accidentally fell into the water. If you are really unlucky, please don't hesitate to turn off the power immediately and take out the battery to avoid water droplets from corroding the machine board. Then send it to repair as soon as possible. This is an emergency measure. In addition, drying the moisture inside the mobile phone with a hair dryer (only warm air can be used) can also slow down the moisture corrosion of the machine board, which is also an emergency measure.
If you install the battery and continue to use it, it may still work normally at that time, but after half a month, the machine board you ignored will be corroded beyond redemption. The normal operation I saw before is actually just an illusion.
When you blow dry your mobile phone with a hair dryer, remember to set the temperature to a minimum. If the heat is too large, the rubber of the car body may be deformed.
Rescue of automatic shutdown
Many users have experienced the situation that the mobile phone will suddenly turn off automatically when it is fully charged and in standby state. The reasons may be as follows:
1. The protection circuit in the lithium battery is too sensitive, and the power will be cut off when the current is high.
2. The battery itself is aging.
3. The mobile phone accidentally enters the water (some mobile phones have no waterproof function)
4. There is dirt on the metal sheet at the contact position of the battery, which leads to poor contact of the power supply.
5. The connection between the battery and the mobile phone is easy to loosen.
If you find the first two problems after inspection, you must go to the repair shop for repair.
But if it is the latter two items, the problem is only that the "battery metal sheet" is dirty and oxidized. As long as you clean it with a glue stick, the situation will get better. Putting paper or film between the battery and the mobile phone can also solve the problem of poor contact caused by loose battery.