Smartphones are cellular phones with more computing power and features than traditional cellular phones, and by the end of 2008 there were approximately 450 million of them. The operating systems commonly used are Symbian, Windows Mobile, iOS, Linux (including Android, Maemo, and WebOS), Palm OS, and BlackBerry OS, which have incompatible applications. Smartphones have a wealth of features because of the ability to install third-party software. In terms of software, since Symbian OS phones account for the largest market share of smartphones in China, there is a wealth of software based on Symbian OS, and there is a wealth of applications based on Windows Mobile, which is rapidly increasing in recent years as its market share rises. There are also a lot of applications on Palm, and there are fewer third-party applications on Linux.
Most Symbian phones are made by Nokia and Sony Ericsson. Windows Mobile phones include HTC (Dopod, Qtek) and GPS-enabled phones from Mio. Cell phones using the Palm operating system include the Treo series by HandSpring (merged with Palm) and the Xplore series by Hong Kong manufacturer GSL. Linux-based phones include MOTO's E680, Haier's N60, and Philips' 968. It can also be a traditional PDA with mobile phone communication function, such as Windows Mobile Pocket PC Phone series, Palm OS Treo series; or other independent types, such as Symbian OS S80, UIQ, and some Linux OS smartphones. However, in recent developments, there is a tendency for these types of smartphones to converge.
Smartphones are different from ordinary cell phones with touch screens. A normal cell phone with a touch screen uses a closed operating system developed by the manufacturer itself, and has very limited functionality.
The term "Smart Phone" is mainly used for "Feature phone", and does not mean that the phone has a lot of features. "Smart"; from another point of view, the so-called "Smart Phone" is a cell phone (like a computer) that can install and uninstall applications at will. "Feature phones cannot install and uninstall software at will, but the emergence of JAVA enables later feature phones to have the ability to install JAVA applications, but the user-friendliness of JAVA programs makes it easier to install and uninstall applications. However, the operation friendliness and efficiency of JAVA program and the operation of system resources are much worse than that of "Smart Phone". (English: Personal Digital Assistant, abbreviation: PDA), generally refers to the handheld computer. Compared to traditional computers, PDAs have the advantage of being lightweight, compact, and mobile while still being powerful, but the disadvantage of having too small a screen and limited battery life.PDAs usually use a stylus as the input device and a memory card as the external storage medium. In terms of wireless transmission, most PDAs have infrared and Bluetooth interfaces to ensure the convenience of wireless transmission. Many PDAs are also able to have Wi-Fi connectivity as well as GPS global positioning systems.
Personal computer products that fall between traditional PCs and PDAs in terms of portability are laptops, UMPCs and tablets. The first PDA was the Newton, produced by Apple in 1992, but it was not a commercial success. Later on, Graffiti, an input method specifically designed for handwriting, appeared and a PDA company utilizing this method as an input method launched the Palm series of products, which was a huge success. At the end of the 20th century, Microsoft entered this field, and first launched the Windows CE 1.0 operating system, but the system in all aspects of the performance is not satisfactory, but then Microsoft launched the Windows Pocket Edition 2002 in one fell swoop to establish the leading position of the PPC operating system.
The most popular Pocket PC operating system platforms are Palm OS and Microsoft Windows Mobile (formerly Windows CE) and Symbian OS series.
When the PDA was first introduced, its main function was to be used as a personal information management system, and it has evolved to the point that PDAs are now capable of installing different software and games; usually, PDAs nowadays are equipped with Bluetooth, Wi-Fi, and IrDA, and are able to connect to the Internet to browse the web and use the PDAs as digital multimedia players, and, if the hardware supports them, the PDAs can also be used as GPS navigational devices. If the hardware supports it, the PDA can also be used as a GPS navigator. Mobile phone, portable phone, wireless phone, cell phone, portable phone, mobile phone, mobile phone, to "portable phone", referred to as mobile phone, cell phone, (different from smart phone!) It is a portable telephone terminal that can be used in a wide range of areas. In the early days (early 1990s and before), because of its high price, only a small number of "powerful people" could afford to buy it, and it was also commonly known as "Big Brother"; in the late 1990s, the price was significantly reduced, and now it has become one of the indispensable electronic items for modern people. The most widely used cell phones worldwide are the so-called second generation (2G), mainly GSM and cdmaOne. They are all digital, in addition to voice communication, can also send and receive text messages (SMS, SMS), MMS (MMS, multimedia messaging), wireless application protocol (WAP) and so on. In mainland China and Taiwan GSM is the most popular, cdmaOne and PHS cell phones are also very popular. The entire industry is currently in the process of migrating to the third generation of cell phones (3G).
The exterior of a cell phone should generally include at least one LCD display and a set of buttons (some phones with touchscreens have fewer buttons). In addition to the typical phone functions, modern cell phones also include PDAs, game consoles, MP3s, cameras, audio recording, GPS, and many more functions, and there is a trend toward PDAs with cell phone functions. To be more precise, there will be no PDA in the future, only the cell phone, the cell phone will contain all the functions of the PDA.
1G
The first generation of cell phone network (1G) refers to the analog signal cell phone, that is, in the 1980s and 1990s in Hong Kong, China, the United States and other film and television productions appeared in the big brother. The first to develop the Big Brother was Dr. Cooper of Motorola in the United States. Due to the limitations of the battery capacity and analog modulation technology requires a large antenna and the development of integrated circuits and other constraints, the appearance of this cell phone four square, can only become mobile can not be counted as portable. Many people called this cell phone "brick" or "black diamond" and so on.
Mobile phones in the late eighties and early nineties have been known as "big brother", it is rumored that the origin of this title comes from the martial arts star Sammo Hung. He was the first person in the movie industry to use a cell phone at the time, and he was known in the industry as "Big Brother" (Jackie Chan was honored as "Big Brother" at the time, because Sammo Hung was his senior, so he was called "Big Brother"), so at that time, the mobile phone was used as the "Big Brother". "), so the cell phone at that time was called "Big Brother". This name is also common in mainland China and Taiwan, today in Taiwan "big brother" can still be used to refer to all cell phones. In mainland China, it refers to this huge old-fashioned cell phone.
In Hong Kong, the peanut oil brand Lion's Ball Mark made a kettle in the shape of a "big brother" as a giveaway in 1987, and it has become so popular that some Hong Kong people call the phone a "kettle".
This kind of cell phone has a variety of systems, such as NMT, AMPS, TACS, but basically the use of frequency division multiplexing can only be used for voice communication, the reception effect is unstable, and the lack of confidentiality, wireless bandwidth is not fully utilized. This type of cell phone is similar to a simple radio duplex radio, the call is locked in a certain frequency, so the use of FM radio can eavesdrop on the call.
2G
The second generation of cell phones is also the most common. Usually these phones use GSM, cdmaOne or PHS, which are very mature standards with stable call quality and suitable standby time. In the second generation, intermediate standards such as GPRS for MMS and WAP for Internet access, as well as a variety of Java programs, are also supported in order to meet the demands of data communication.
3G
Mobile phones for the third-generation mobile communication system (3G) have also been developed, but they have not been widely used due to the lack of popularity of related networks. One of the goals at the start of the third generation of cell phones was to develop a wireless communications system that could be used globally, but the actual end result has been the emergence of a number of different standards, with CDMA2000, WCDMA and TD-SCDMA competing. These new standards are all based on CDMA (Code Division Multiple Access) technology, which has been further developed in terms of bandwidth utilization and data communications.
3.5G
3.5G cell phones favor security and data communication. On the one hand, the protection of personal privacy is strengthened, on the other hand, the research and development of data services is strengthened, more multimedia functions are introduced, cell phones have more powerful computing power, and are no longer just a terminal for personal calls and text messages, but a more versatile choice. Mobile office and the strong demand for communication will make the integration of cell phones and personal computers tend to accelerate, cell phones will gradually have the function of personal computers, in this regard, the cell phone market in Shenzhen has been fully reflected.
Mobile phones will be more intelligent, miniaturization, security, multifunctionality. 3.5G cell phone has now been issued in Taiwan, and on sale in the market. Handheld game console (Handheld game console), also known as portable game consoles, handheld game consoles or portable game consoles, referred to as handhelds, refers to small, specialized game consoles that are easy to carry around, which can be converted to video game software anytime, anywhere. It is a category of portable games, and some cell phones are now included in the list of handhelds. Handheld games originated in 1976 with the Mattel Electronics Handheld Games series developed by Mattel Corporation in the United States. The first product to hit the market was called Mattel Auto Race, which was the earliest handheld to utilize LEDs in video games. Handheld games are generally characterized by a short process and a fast pace. Since their purpose is for people to be entertained in a relatively short period of time (such as waiting for a bus or standing in line), they do not have complex plots like general video games; at the same time, due to hardware constraints, general handhelds do not have the same graphics and sound as the same period of home gaming hardware (this may have changed due to the introduction of the Nintendo NDS and the Sony PSP). This places a higher demand on game designers.
In Asia, especially Japan and China, handheld games have a large user base and have led to the development of a large number of related software and hardware industries. This is because handheld games are characterized by easy portability and anytime entertainment. Meanwhile, in recent years, the collection and exchange elements added to handheld games have further enhanced the charm of such games, such as the famous Pokémon games, which have become a cultural phenomenon and symbol, and whose every new release becomes a topic of discussion among youth groups.
Handheld games are the game software for handhelds, and most handheld games are designed for only one type of handheld, so platform ports are rare.
Handheld game console at the storage media
ROM cassette SD memory card MMC memory card UMD: SONY for the PSP exclusive development of small disc media "Universal Media Disc" short, the capacity of up to 1.8GB, diameter of about 6 cm, the outer layer of a similar MD, MMC, and so on. The outer layer has a protective case similar to MD and MO. Hard Disk: Dedicated hard disk or external hard disk Built-in flash memory