I don't understand these things. -。

1. Network type

The full name of 1. 1GSM is Global System for Mobile Communications. Communications, a global mobile communication system in Chinese, commonly known as "GSM", is a technical standard of mobile communication originated in Europe and is the second generation of mobile communication technology. The purpose of its development is to enable all parts of the world to use the same mobile phone network standard, so that users can travel around the world with one mobile phone. China introduced this technical standard in the early 1990s, and has been using cellular analog mobile technology, that is, the first generation of GSM technology (China closed the analog mobile network on February 3, 20061day). At present, China Mobile and China Unicom each have a GSM network, which is the largest mobile communication network in the world. The GSM system includes GSM 900:900MHz, GSM 1800: 1800 MHz and GSM- 1900: 1900 MHz.

1.2CDMA is the abbreviation of code division multiple access, which is a brand-new and mature wireless communication technology developed on spread spectrum communication technology, a branch of digital technology. The principle of CDMA technology is based on spread spectrum technology, that is, the information data to be transmitted with a certain signal bandwidth is modulated by a high-speed pseudo-random code with a bandwidth much larger than the signal bandwidth, so that the bandwidth of the original data signal is expanded and then transmitted by carrier modulation. The receiver uses the same pseudo-random code to correlate with the received bandwidth signal, and changes the broadband signal into the narrowband signal of the original information data, that is, despreading, thus realizing information communication.

1.3 dual-mode dual-standby mobile phone is a mobile phone that can use two different mobile communication networks (such as GSM/CDMA dual-mode) and can realize the simultaneous standby of two mobile network numbers. "Dual-mode and dual-standby" means that two networks and two numbers are online at the same time. On a global scale, the coexistence of G network and C network is a reality, and the coexistence of 2G and 3G is inevitable. Therefore, the existence of dual-mode or even multi-mode mobile phones is inevitable, which is the key to the success of dual-mode or multi-mode non-switching. The realization of dual mode and dual standby can make customers accept new things without changing the original consumption and usage habits, which is conducive to developing new customers. For China Unicom, dual-mode dual standby can bridge the two networks (GSM network and CDMA network) of Unicom, make up for the lack of coverage of the two networks, realize global roaming, and reverse the passive situation of the domestic high-end mobile communication market.

1.4 CDMA is the third generation mobile communication system specially formulated by 3GPP, which is based on GSM MAP core network and uses UTRAN(UMTS terrestrial radio access network) as the wireless interface. At present, WCDMA has Release 99, Release 4, Release 5, Release 6 and other versions. W-CDMA (Wideband Code Division Multiple Access) is an ITU (International Telecommunication Union) standard, which evolved from CDMA and is officially considered as a direct extension of IMT-2000. Compared with the technology usually provided in the market, it can provide higher data rates for mobile and handheld wireless devices. WCDMA adopts direct sequence spread spectrum code division multiple access (DS-CDMA) and frequency division duplex (FDD), with a chip rate of 3.84Mcps and a carrier bandwidth of 5MHz. Based on Release 99/ Release 4, it can provide the highest user data transmission rate of 384kbps within the bandwidth of 5MHz. W-CDMA can support voice, image, data and video communication between mobile/handheld devices, and the rate can reach 2Mb/s (for local area network) or 384Kb/s (for broadband network). The input signal is first digitized, and then transmitted in a wide spectrum range in a coded spread spectrum mode. Narrow-band CDMA uses a carrier frequency with a width of 200KHz, and W-CDMA uses a carrier frequency with a width of 5MHz.

2. Mobile phone brand

This item refers to the original address of the mobile phone, Europe and America (Europe and America), Japan and South Korea (Japan and South Korea) (domestic).

3. Time to market

This item refers to the time when mobile phones are sold in major shopping malls and electronic cities. This time only refers to the unified sales time of licensed products.

Two. More features:

1. camera pixels

1. 1 The number of different colors that a pixel can express depends on the number of bits per pixel (BPP). This maximum number can be obtained by taking the square of color depth. For example, common values are:

8 bpp[28 = 256； (256 colors)];

16 bpp[2 16 = 65536； (65536 colors, called high color)];

24 bpp[224 = 167772 16； (16,777,216 color, called true color)];

48 bpp[248 = 28 14749767 10656； (28 1, 474, 976, 7 10, 656 colors, which are used by many professional scanners).

Graphics with 1.2 256 colors or less are usually stored in a block or plane format in a video memory, where each pixel in the video memory is an index value of a color array called a palette. Therefore, these patterns are sometimes called index patterns. Although there are only 256 colors at a time, these 256 colors are selected from a much larger palette, usually 16 megacolors. You can get the animation effect by changing the color values in the palette. Logos of Windows 95 and 98 are probably the most famous examples of this kind of animation.

1.3 For depths exceeding 8 bits, these numbers are the sum of three components (red, green and blue). The depth of 16 is usually divided into 5 bits of red, 5 bits of blue and 6 bits of green (eyes are more sensitive to green). The depth of 24 bits is usually 8 bits per component. In some systems, 32-bit depth is also optional: this means that a 24-bit pixel has 8 extra numbers to describe transparency. In the old system, 4bpp( 16 color) is also very common.

1.4 When an image file is displayed on the screen, the number of bits per pixel may be different for raster text and display. Some raster image file formats have greater color depth than others. For example, the maximum depth of GIF format is 8 bits, while TIFF files can handle 48-bit pixels. No display can display 48-bit colors, so this depth is usually used for special professional applications, such as film scanners and printers. This file is drawn at a depth of 24 bits on the screen.

2. Screen color

256-256 colors (below 4k)

65536-65536 colors (over 60000 colors)

1677 7216-16,77 7,216 colors (more than160,000 colors)

3. Home screen resolution

Screen size: The screen size of a mobile phone is divided into two concepts: physical size and display resolution.

3. 1 Physical size refers to the actual size of the screen. The large screen must be equipped with high resolution at the same time, that is, how many pixels can be displayed in this size, and the more pixels are displayed, the greater the room for performance. The screen sizes of the two mobile phones are almost the same, but one can only display two lines of Chinese characters and the other can display five lines of Chinese characters. Aside from the difference in font size, the key is the resolution of the screen, and the resolution is larger. Under the same font size, more lines of Chinese characters can naturally be displayed. Color screen mobile phone is really good. Without enough resolution, what's the use of high color quality? Color mobile phone screen is generally around 128× 128.

3.2 Screen resolution is the screen resolution obtained by dividing the number of LCD units ([dots]) by the screen area. This index is the biggest factor that determines the picture quality. Therefore, when purchasing a color screen mobile phone, we should not only pay attention to the depth of color that can be displayed on the screen, but also the screen resolution is a very important determinant.

3.3 The dot matrix screen is 128* 128 (or (128+-x)*( 128+-x), where x is between 1 and 32), and the aspect ratio is/kloc-.

4. Chord ringtones

4. 1 ringtones generally support MIDI and MMF. Before the appearance of chord ringtones, mobile phones generally used MIDI tones as ringtones, which sounded dull. At present, MMF-formatted chord ringtones (usually 4, 16, 40 chords) use audio hardware chips to achieve polyphonic effect, which can provide a variety of musical instrument timbres. The number of chords is the number of sound sources that a mobile phone can generate at the same time.

4.2 The number of chords in a mobile phone is equal to the number of tracks in midi format, but each track of the mobile phone is a single-tone track, which is the biggest difference from midi that we often listen to on the computer, and also the origin of the influence of chord number on the ringtone effect.

4.3 A chord is a combination of three or more simultaneous or successive pronunciations according to a certain interval relationship, which is called a "chord". In traditional harmony, three-dimensional superposition is the principle of chord formation. Usually pronounced at the same time When you press 1, 3, 5 on the piano at the same time, the sound is major triad with 1 as the root. The advantage of chords is that the sound is full, beautiful and expressive. Major triad sounds loud, and the minor chords are euphemistic.

4.4 The so-called electronic music midi format is to record timbre, reputation, loudness, angle, time, etc. For each sound, and query the sound library according to the record to get the sound to be emitted. Simply put, each track corresponds to an instrument, and the music played by the instrument at each moment is recorded in a specific format. For example, at a certain moment, a chord composed of the above-mentioned 135 is recorded on the audio track defined as piano, and then the chip queries the sound library to get the corresponding sound effect, and then performs synthetic playback. Therefore, the sound library is the key factor that affects whether midi is good or not, and a good sound library occupies a lot of space.

4.5 The method of recording music by mobile phone is the same as or similar to midi. The recorded sounds are all single tones, and no complicated chord sound effects are recorded. In that case, why are our mobile phones so beautiful? Since you can't press "135" on one piano at the same time, you can press 1, 3 and 5 on three pianos at the same time. In fact, this is how cell phone chords are realized. Although this kind of chord is not as good as the real chord, it is almost confusing to release it from the mobile phone. This process of changing a chord on one instrument into a single tone of N instruments seems to be called "chord decomposition". If you often use psmplay to convert ringtones, when the converted midi is complicated, you will be prompted that "the number of broken strings exceeds16 ..." Similarly, many songs that sound good on the computer are directly transmitted to the mobile phone without decomposition, and the effect is much worse. As long as you look at it with a good midi editing software, you can find that there are often many tracks in a song with the same tone, and each track is a tone.

4.6 Therefore, a 16 "chord" mobile phone can make five instruments emit triads at the same time, while a 40 "chord" mobile phone can make five instruments emit heptachords at the same time, or 13 instruments emit triads at the same time, or ...... The more "chords" there are, the more combinations there are, and the richer the timbre will be. This is the sound effect difference caused by the number of "chords" in mobile phones.

5. Idle time

When the mobile phone works in the waiting state, it is called standby. The current consumed during standby is relatively small, which has little to do with the network. According to different models, the current consumed varies from several milliamps to several tens of milliamps.

When the mobile phone works in the waiting state, it is called standby. Standby time refers to the continuous use time of the battery in the standby state of the mobile phone. It can also be explained that the mobile phone is fully charged, and the battery can maintain itself in the standby state without talking or turning off the phone until a low battery warning appears. The current consumed during standby is relatively small, which has little to do with the network. According to different models, the current consumed varies from several milliamps to several tens of milliamps. The standby time depends on the capacity of the battery and the current consumed by the mobile phone. The algorithm of its standby time is: cell phone battery capacity/working current during standby = standby time.

The standby time given by the manufacturer is only a test data, and the actual standby time will be affected by many factors, such as the above battery capacity, mobile phone usage status, network signal strength and so on.

6. Expansion card

Memory card type: Flash card is a memory that uses flash technology to store electronic information. Generally, it is used as a storage medium in digital cameras, palmtop computers, MP3 and other small digital products, so it looks like a card, so it is called a flash card. According to different manufacturers and different applications, flash cards probably include SmartMedia(SM card), Compact Flash(CF card), MultiMediaCard(MMC card), Secure Digital(SD card), Memory Stick (memory stick), XD-Picture card (XD card) and MICRODRIVE. Although the appearance and specifications are different, the technology is the same. Memory cards used as mobile phones include MMC card, RS-MMC card, SD card, mini SD card, T-Flash card, Sony memory stick and CF card.

7.【QQ Support 】【 mp3 Support 】【 Built-in Radio 】【 Built-in Antenna 】【 Chinese SMS 】【 Extra Long SMS 】【 Multimedia SMS 】【 Clock 】【 Built-in Vibration 】【 total recall 】【 Animation Screen Saver 】【 Graphic Menu 】【 Standby Screen 】【 Theme Mode 】【 Alarm Clock 】【 Calculator 】【 Timer 】【 Calendar 】

Can the mobile phone directly use the above functions?

Three. high function

1. Number of phone books

How many calling cards can a mobile phone store?

2. Operating system

Whether it is an intelligent system, and according to which system to start the software.

Mobile operating system is generally only suitable for high-end smart phones. At present, in the smart phone market, China market is still dominated by personal information management phones. With the participation of more manufacturers, the overall market competition began to show a decentralized trend. Judging from the market capacity, competition and application, the whole market is still in its infancy.

At present, there are four main operating systems used in mobile phones: PalmOS, Symbian, Windows CE and Linux.

Symbian system: Symbian is a real-time, multi-tasking pure 32-bit operating system with the characteristics of low power consumption and less memory occupation. Very suitable for mobile devices such as mobile phones. After continuous improvement, it can support GPRS, Bluetooth, SyncML and 3G technologies. Most importantly, it is a standardized and open platform, and anyone can develop software for Symbian-enabled devices. Different from Microsoft products, symbian separates the general technology of mobile devices, that is, the kernel of operating system, from the graphical user interface technology, which can adapt to different input platforms well, and also allow manufacturers to make more friendly operating interfaces for their products, in line with the personalized trend, which is the main reason why users can see different Symbian systems. Now java programs developed for this platform have begun to prevail on the Internet. Users can expand the functions of mobile phones by installing these softwares.

In the development stage of Symbian, there are three branches: Crystal, Pearl and Quarz. The first two are mainly aimed at the communicator market, which is also the most common on mobile phones, and will be the main force of smart phone operating system in the future. The first mobile phone based on Symabian system was Ericsson R380 mobile phone which went on sale in 2000. What really caught people's attention at the same time was the Nokia 92 10 launched by 200 1. It uses a crystal branch system. Nokia 7650 and 3650 launched in 2002 are both Symbian Pearl models, of which 7650 is the first smartphone product based on 2.5G network, both of which belong to Symbian version 6.0. Sony Ericsson has introduced a model that also uses the Pearl branch of Symbian. Version has been developed to 7.0, which is specially developed for 3G networks. At present, Nokia has reached 6630 and 668 1 of 8.0, which can be said to represent the most powerful mobile phone operating system today. In addition, Symbian has supported external storage devices such as MMC cards since version 6.0, which makes it possible to store more software and various large-capacity multimedia files.

Windows Mobile system: Windows Mobile system includes Pocket PC, smart phone and media center. Pocket PC is aimed at wireless PDA, and Smartphone is specially designed for mobile phones. IT has been used by many new mobile phone manufacturers from the IT industry, and the growth rate is very fast.

According to Microsoft's official statement: "Windows Mobile extends the familiar Windows experience to the mobile environment, so you can use it to work immediately."

In fact, Windows Mobile is a major brand adjustment for Microsoft to enter the field of mobile devices. It includes three platform systems: PDA, smart phone and media center, which is oriented to the personal mobile electronic consumer market. Because most models support color display, it consumes a lot of power, and because Windows CE itself devours resources. In terms of function expansion, Microsoft tends to use it in an integrated way, and most of them have standard CF card slots. Users can increase memory and install cameras, modems and other equipment according to their own needs.

Windows Mobile, which is specially developed by Microsoft for mobile phones, provides many functions, and the functions realized on different platforms overlap and each has its own emphasis. All three platforms support data synchronization with the desktop. The functions provided by smart phones are mainly contacts, and the main supported functions are: telephone, email, contacts and instant messaging. The function of PocketPC focuses on personal transaction processing and simple entertainment. The main supported functions are: scheduling, mobile version of Office, simple multimedia playback.

Linux system: Linux system is an open source operating system, and many versions are popular at present. But it has not been widely supported.

Linux has entered the mobile terminal operating system for nearly a year, and it has attracted more and more attention from terminal manufacturers and operators, including Motorola and NTT DoCoMo, because of its open source advantages. Mobile phones based on Linux have been developed, including Motorola A760, A768, CEC e2800, Samsung i5 19 and so on. In June 2004, at the "LinuxWorld Expo/Tokyo 2004" Expo held in Tokyo, Japan, Japanese mobile phone manufacturer NEC showed its mobile phone equipped with Linux operating system. China Datang Telecom also announced in July that Linux will become its TD-SCDMA 3G mobile phone operating system.

Compared with other operating systems, Linux is a latecomer, but it has two incomparable advantages. First, Linux has open source code, which can greatly reduce the cost. Secondly, it not only meets the requirements of mobile phone manufacturers to develop their own Linux mobile phone operating system according to the actual situation, but also attracts many software developers to develop content application software, enriching third-party applications.

However, Linux operating system has its inherent shortcomings: it is difficult to get started, few engineers are familiar with its development environment, and the integrated development environment is poor; Because the source code of Microsoft PC operating system is not open, the connectivity between Linux-based products and PC is poor; Although there are a large number of companies engaged in the development of Linux operating system at present, there are few companies with strong development strength, and these companies are developing independently, so it is difficult to make greater technological breakthroughs.

Although Linux has unique advantages in technology and market, it can't compete with Symbian at present, and it is not easy to gain a foothold and seize market share in the increasingly competitive mobile phone market.

Palm OS operation: This is a 32-bit embedded operating system, which is mainly used for mobile terminals. This system was originally developed by Palm Computing Department of 3Com Company, and now Palm Computing has become an independent company. The combination of Palm OS and HotSync can synchronize the information on the mobile terminal and the computer, and extend the functions of the desktop to the mobile device.

Palm OS operating system was developed by Palm Company and licensed to Handspring, Sony, Qualcomm and other equipment manufacturers. This operating system prefers PDA operating system.

Palm OS dominates the PDA market. Palm's product line itself includes smartphones, and it also announced the merger with Handspring, the earliest smartphone developer, to separate the software department.

Step 3 show up

The general shape of a mobile phone

4. GPRS Support, Infrared Data Association, K-JAVA, Built-in Modem, Mobile Phone MSN, Original CCD Camera, PDA Support, GPS Support, Multimedia Card, Photosensitive Device, Zoom Mode, Flight Mode, Bluetooth Support, wap Internet Access, Data Synchronization and EFR STK Service.

Can the mobile phone directly use the above functions?

I'm exhausted, aaaaaaaaaaaa.