Smart phone common sense

Smart phone is a kind of mobile phone with corresponding open operating system. Commonly used operating systems are: Symbian, iOS, Android, Maemo, MeeGo, Windows phone. smartphone

Smart phone refers to "a mobile phone with an independent operating system, similar to a personal computer, in which users can install programs provided by third-party service providers, such as software and games, and can realize wireless network access through mobile communication networks".

Their application software is incompatible with each other. Because third-party software can be installed, smart phones are rich in functions.

The birth of smart phone is the evolution of PocketPC. The earliest PDA didn't have the call function of mobile phone, but with the increase of users' dependence on PDA's personal information processing function, they were not used to carrying mobile phone and PPC at any time, so manufacturers transplanted PDA system to mobile phone, and the concept of smart phone appeared. Smart phones have more comprehensive processing capabilities than traditional mobile phones [1], such as S60 series of Symbian operating system, S60 and Symbian3 of Symbian, and some smart phones equipped with MeeGo operating system. However, as far as the recent development is concerned, the types of these smart phones tend to merge.

Smart phones are similar to traditional mobile phones in appearance and operation mode, including not only touch screen, but also non-touch screen numeric keyboard mobile phones and full-size keyboard operation mobile phones. However, traditional mobile phones all use the closed operating system developed by the manufacturers themselves, which can achieve very limited functions and does not have the scalability of smart phones.

The word "smart phone" mainly refers to "feature phone", and does not mean how smart the phone is. From another perspective, the so-called "smart phone" is a mobile phone that can install and uninstall application software at will (just like a computer). The "feature phone" cannot install or uninstall software at will. The appearance of JAVA enabled the later "feature phones" to have the function of installing JAVA applications, but the operation friendliness, running efficiency and operation of system resources of JAVA programs were much worse than those of "smart phones". Smart phone [2]

It should be noted that although the copy-and-paste function is considered to be an important function, smart phone systems such as symbian have long supported the copy-and-paste function, but IOS and Windows Phone failed to achieve similar functions in the early days. Fortunately, IOS and Windows Phone already support the copy-and-paste function.

2. Basic knowledge of smart phones

What is a smart phone? Generally speaking, it 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 smart phone will surely become the new direction of mobile phone development in the future.

What about the smart phone? The popular saying is "Wenquxing+mobile phone = smart phone". A comparison shows that there is a big difference between PDA and Wenxing. In terms of functional application, PDA has its own obvious advantages.

In fact, the easiest thing to distinguish between smart phones and smart phones is whether there is an operating system. Let's take a look at several prerequisites for becoming a smart phone:

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 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.

Since only mobile phones with operating systems can be called smart phones, what are the types of operating systems? Since the birth of smart phone is related to PDA, its operating system will certainly be related to PDA. Symbian and Windows CE, Palm and Linux are still the four camps. However, unlike Palm and Windows CE competing for hegemony on PDA operating system, Symbian has taken the lead in smartphone operating system, and Sony Ericsson, Nokia, Motorola and Panasonic basically adopted Symbian-based operating system.

3. Some basic knowledge about mobile phones

(1) The technical term for brushing a mobile phone refers to changing or replacing some original languages, pictures, * * *, software or operating systems of the mobile phone through certain methods.

Generally speaking, brushing the machine is to reinstall the system for the mobile phone. Brush machine can make the function of mobile phone more perfect and restore the mobile phone to its original state.

Under normal circumstances, the Android mobile phone system is damaged, resulting in functional failure or failure to boot, which is generally restored by brushing. Brush machine can be official or unofficial.

(2) Jailbreak "Jailbreak" refers to bypassing Apple's many restrictions on the operating system on its devices and enabling it to "Root" the basic operating system. Simply put, "jailbreak" allows iPhone users to download other unofficial applications from outside the Apple App Store or customize the user interface.

Literally, it's like a prisoner who escaped from a deep prison and gained his freedom; And there are no constraints. (3)rom The rom in the smart phone configuration refers to EEProm (electrically erasable and writable read-only memory), which is similar to the hard disk of a computer. How many things a mobile phone can store depends on its capacity.

The basic package+update package is collectively referred to as ROM package. Generally divided into two categories. One is the original ROM from the official mobile phone manufacturer, which is characterized by stability and different customization functions with the manufacturer; The other is to develop a native ROM written by enthusiasts by using the officially released source code, which is characterized by adjusting according to the specific needs of users, so as to make the ROM more in line with the usage habits of users in different regions.

For example, Android rom is an open source operating system based on Linux, which is mainly used for portable devices. The Android operating system was originally developed by Andy Rubin, and initially mainly supported mobile phones.

In 2005, it was acquired and funded by Google, and open handset alliance was established to develop and improve it, and gradually extended to tablet computers and other fields. The main competitors of Android are Apple's iOS and RIM's BlackBerry OS.

(4) Pixel "Pixel" consists of the letters of the words image (foreign language: Picture) and Element (foreign language: element). It is the unit used to calculate digital images. Like photographic photos, digital images also have continuous shadows. If you enlarge the image several times, you will find that these continuous tones are actually composed of many small squares with similar colors, which are the smallest units of the image. This smallest graphic unit can usually display a coloring point on the screen.

The higher the pixel, the richer the sample and the more realistic the color is. (5) Flash memory is a long-life nonvolatile memory (data information can still be stored when power is off), and data deletion is not in single byte units but in fixed blocks (Note: NOR Flash is stored in byte units. )

The block size is usually 256KB to 20MB. Flash memory is a variant of EEPROM. The difference between flash memory and EEPROM is that EEPROM can be erased and rewritten at byte level, not the whole chip, and most chips of flash memory need block erasure.

Because data can still be saved when power is off, flash memory is usually used to save setting information, such as data in computer BIOS (basic input and output program), PDA (personal digital assistant) and digital camera. (6)cpu The cpu of a mobile phone is one of the mobile phone features that shoppers ignore in daily life. In fact, the most important thing for a smart phone with excellent performance is its "core", that is, CPU. Like the computer CPU, it is the control center system of the whole mobile phone and the control center of the logic part.

Microprocessor achieves control by running the software in the memory and calling the database in the memory. 1, Texas Instruments Advantages: low frequency, high energy and low power consumption. Disadvantages of CPU necessary for high-end smart phones: high price, high corresponding mobile phone price, low performance of OMAP3 series GPU, but obvious improvement of OMAP4 series and weak data processing ability.

2.INTEL's advantages: high CPU frequency and high speed; Disadvantages: low power consumption and low unit frequency performance; 3. Advantages of Qualcomm: high frequency, excellent data processing performance, the most extensive product roadmap, and support for all kinds of terminals, including smart phones, tablet computers, smart TVs, etc. , and support all mainstream mobile operating systems and 3G/4G network standards; Disadvantages: weak graphics processing ability and high functional consumption. 4. Advantages of Samsung: Low power consumption, Samsung Hummingbird S5PC 1 10 has the strongest single core, good DSP collocation and strong GPU performance. Disadvantages: Samsung Orion dual-core heating problem is big, MALI400GPU has a single composition and poor compatibility. 5.Marvell Advantages: It inherits and exerts the performance of PXA. Disadvantages: High power consumption. 6.NVIDIA advantage: the first dual-core CPU to be listed. Geforce ULP has small area, strong performance and low power consumption. Disadvantages: Tegra2 removes NEON due to power consumption, which leads to large video decoding problems and less support for hardware decoding formats. 7. Huawei Advantage: 20 12 the smallest quad-core A9 architecture processor in the industry.

He is a high-performance CPU, which is the shortcoming of Huawei's independent design: poor compatibility. (7) Snapdragon is a highly integrated "integrated" mobile processor series platform launched by Qualcomm, covering entry-level smartphones and even high-end smartphones, tablets and next-generation smart terminals. Based on the microprocessor core customized by ARM architecture, Snapdragon combines the industry-leading 3G/4G mobile broadband technology with powerful multimedia function, 3D graphics function and GPS engine.

20 12 On February 20th, Qualcomm officially named the Chinese name of Snapdragon series processors as "Snapdragon". As a new technology, CDMA CDMA2000 is rapidly sweeping the world and has occupied 20% of the wireless market.

By the end of 20 12, the number of CDMA2000 users worldwide had exceeded 256 million, and 156 operators in 70 countries had commercialized 3G CDMA services. Dozens of OEMs around the world, including Ankexin Communication Technology Co., Ltd. authorized by Qualcomm, have launched EVDO mobile intelligent terminals. In 2002, Qualcomm's chip sales reached a record high. Qualcomm has been there since 1994.

4. Mobile phone knowledge

Mobile phone, usually called mobile phone, was also called mobile phone in the early days, and it is a portable telephone terminal that can be widely used. It was first invented by Soviet engineer Leonid Kupriyan Norwich in 1957.

So far, it has developed into the 4G era. As a major invention of human science and technology, almost none of them can enter every household in Qian Qian like mobile phones, and are widely used by thousands of ordinary people in Qian Qian.

The mobile phone was first invented by Soviet engineer Kupriyan Norwich in 1957. 1958, the Institute of Communication Science in Voronezh, Soviet Union began to develop the world's first fully automatic mobile phone communication system "Altai" (алтай). 1963, Altai system was tested in Moscow. Since the end of 1969, "Altai" system has officially provided mobile services in more than 30 cities in the Soviet Union.

Mobile phones can be divided into smart phones and non-smart phones. Generally, the performance of smart phones is better than that of non-smart phones, but non-smart phones are more stable than smart phones. Most non-smart phones and smart phones generally use the CPU of British ARM company. Smartphones, on the other hand, have higher main frequency and faster running speed, and the tasks of smartphone processors are faster.

It is convenient in daily life (for example, the main frequency of Nokia n8 1 is 369 MHz), while the main frequency of non-smart phones is relatively low and the running speed is relatively slow (for example, the main frequency of Nokia 5000 is 50 MHz). Smart phone means "like a personal computer, it has an independent operating system, most of which are large-screen machines, and some of them are touch capacitive screens." Users can install programs provided by third-party service providers, such as software and games, and continuously expand the functions of mobile phones through such programs, so as to realize wireless network access through mobile communication networks.

Generally speaking, it 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 developed in this respect, such as: stock, news, weather, transportation, goods, application download, music and picture download, etc.

Motorola Mobile Phones (9)1973 In April, marty cooper, an engineer and technician of the famous American Motorola Company, developed the first American civil mobile phone. Because of the strong propaganda ability of the United States, marty cooper is regarded as the "father of modern mobile phones". Motorola was founded in 1928.

1947, renamed Motorola, used as a trademark from 1930. Headquartered in schaumburg, Illinois, USA, it is located in the suburb of Chicago.

It is one of the fortune companies in the world 100, and a global leader in the field of chip manufacturing and electronic communication. 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 mobile phone Nokia mobile phone: humanized operation (S40), complete product line, good quality, strong signal, strong practicality in life, good photo effect, and the old man-machine is deeply loved by the elderly. Disadvantages of Nokia mobile phones: the receiver has a low sound and a moderate shape, and the speaker sound quality of most mobile phones is far worse than that of domestic machines. High-end smart phones (Symbian system) have been put into the arms of Microsoft (Windows Phone) 20 1 1.

20 1 1 February11day, Nokia and Microsoft jointly released WP system mobile phones. 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. Samsung, the abbreviation of Samsung Group, the largest enterprise group in South Korea, includes 44 subsidiaries and several other legal entities, and 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, covering 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. Samsung mobile phone Samsung mobile phone advantages: rich product line, large screen, clear, bright colors and high general configuration.

At present, Samsung is the world's largest mobile phone manufacturer, and also the world's largest electronic enterprise with revenue. Its global enterprise market value of 20 1 1 is150 billion US dollars. BlackBerry Blackberry is a portable wireless communication equipment brand of RIM Communication Company of Canada, which was established 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 are equipped with a small but complete 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. Apple Apple Company, full name of Apple Inc, formerly known as Apple puter, announced its name change at Macworld Expo in San Francisco on June 9, 2007.

Headquartered in Cupertino, California, USA, its core business is electronic technology products. The world's top computer system comes from Apple, and the global smartphone share is 17. 1%. (The mobile phone produced by Apple is called iPhone, see the entry of iPhone for details).

Advantages of Apple mobile phone: strong entertainment, stable system, good performance, fashionable and beautiful, prominent screen, many applications and good quality. Disadvantages of iphone5 Apple mobile phone: closed system, high price and complicated data transmission.

IPhone Apple Industry Line On June 29th, 2007, the iPhone was released in July 2008 1 1.

5. What hardware knowledge does a smart phone have?

Some technical knowledge points explain NFC technology gravity sensor network mode distance sensor light sensor operating system Bluetooth CPU type screen color video format wireless AP screen material electronic compass expansion card flight mode data service custom machine revision machine built-in Wi-Fi screen size camera pixel D LNA technology WLAN function II hardware explanation 1. Operating system At present, the mainstream operating systems are Apple's IOS, Google's Android, Microsoft's WP and BlackBerry.

There are other operating systems: Firefox OS, Samsung Tizen, PalmOS, Sailfish OS, Ubuntu OS, Xiaomi Meizu's pseudo-Android system. 2. Cameras are divided into front cameras and rear cameras.

For cameras, the main requirement is actually excellent imaging effect. The effect of our 3.2 megapixel digital camera will certainly not be worse than that of a 5 megapixel mobile phone, because we need to consider the photosensitive elements and materials used in the camera, aperture and so on. But we will know that the standard of pixels is actually based on the resolution of photographic imaging.

3. Battery capacity has also become a starting point standard for purchasing mobile phones. After all, with the advent of multimedia era, the application of mobile phone entertainment function and the increase of mobile phone usage frequency, battery capacity has become the endurance standard. The capacity unit of mobile phone battery is mAh or wH, which can be interchanged, because the voltage of mobile phone battery is generally 3.7V, and the charger should be original for safety! 4. Mobile phone network standards mainly include mobile: GSM, TD-SCDMA, TD-LTE, Unicom: GSM, WCDMA, and telecom: CDMA2000.

5. Antenna chips mainly include communication signals, GPS navigation antenna chips, WIFI wireless network chips, NFC near-field transmission chips, Bluetooth chips and infrared chips (obsolete), which will bring more functional standards to mobile phones. Wi-Fi is an industry term published by an organization called "Wireless Ethernet Compatibility Alliance" (WECA), which is translated into "wireless compatibility certification" in Chinese.

It is a short-distance wireless transmission technology, which can support the radio signal of surfing the Internet within hundreds of feet. With the development of technology, IEEE 802. 1 1a and IEEE 802.1g appeared, and the standard IEEE 802. 1 1 has been collectively referred to as Wi-Fi.

From the application level, to use Wi-Fi, users must first have a Wi-Fi-compatible client device. Wi-Fi is a technology that can wirelessly connect personal computers, handheld devices (such as PDA and mobile phone) and other terminals.

Wi-Fi is a brand of wireless network communication technology, which is owned by the Wi-Fi Alliance. The purpose is to improve the interoperability between wireless network products based on IEEE802. 1 1 standard.

At present, most people will confuse Wi-Fi with IEEE 802. 1 1. Even equate Wi-Fi with wireless Internet access.

6. Bluetooth is a radio technology, which supports short-distance communication of devices (generally within 10m). It can exchange wireless information between many devices, including mobile phones, PDA, wireless headphones, notebook computers, related peripherals and so on.

Using Bluetooth technology, the communication between mobile communication terminal devices can be effectively simplified, and the communication between devices and the Internet can also be successfully simplified, which makes data transmission faster and more efficient and broadens the road for wireless communication. Bluetooth adopts distributed network structure, fast frequency hopping and short packet technology, supports point-to-point and point-to-multipoint communication, and works in the global 2.4GHz ISM (industrial, scientific and medical) frequency band.

Its data rate is 1Mbps. Time division duplex transmission scheme is adopted to realize full duplex transmission.

Bluetooth 4.0 Technical Specification Bluetooth 4.0 includes three sub-specifications, namely, traditional Bluetooth technology, high-speed Bluetooth technology and new Bluetooth low-power technology. The improvement of Bluetooth 4.0 is mainly reflected in three aspects: battery life, energy saving and device type.

It has many advantages, such as low cost, cross-vendor interoperability, low delay of 3 milliseconds, long distance above 100 meters, AES- 128 encryption and so on. In addition, the effective transmission distance of Bluetooth 4.0 has also been improved. The effective transmission distance of Bluetooth version 3.0 is 10 meter (about 32 feet), while that of Bluetooth version 4.0 can reach 100 meter (about 328 feet).

7.CPUCPU is the abbreviation of CentralProcessing Unit, which generally consists of logical operation unit, control unit and storage unit. The CPU of a mobile phone is simply the central processing unit. The so-called central processing unit is its core part (belonging to the logic part). When the mobile phone is turned on and other work is carried out, the central processor issues instructions to control the work of each component. Of course, you need a crystal oscillator to provide a frequency signal to run, and you need a power supply, and then you can call up the program from memory.

CPU, main chip; Its main frequency and core determine the running speed of the mobile phone! A powerful CPU can bring higher computing power to mobile phones. At present, the mobile phone CPU architecture mainly includes ARM architecture and X86 architecture. As far as mobile CPU is concerned, ARM is in a dominant position.

Manufacturers producing ARM architecture are: Apple (Samsung OEM), Samsung, NVIDIA, Qualcomm and TI; Intel is the only one in X86 architecture. 8.RAMRAM(randomaccess memory) random memory, also known as running memory (referred to as operating memory).

A memory in which the contents of a storage unit can be taken out or stored at will as required, and the access speed is independent of the location of the storage unit. This kind of memory will lose its storage content when power is cut off, so it is mainly used to store programs that are used for a short time.

The larger the RAM, the faster the mobile phone runs and the smoother the multitasking mechanism. The speed of the mobile phone system and the running speed of the program mainly depend on the size of the memory (ram).

9. Read-only memory Read-only memory. As the name implies, this kind of memory can only be read, and it cannot be read and written at any time like RAM.

It only allows one write opportunity after production, and once the data is written, it cannot be changed. Another feature is that the data in the memory is not lost after power failure and can be saved for hundreds of years.

ROM is storage memory, which is used to install system programming and some input media files, generally equivalent to computer C disk. So the bigger this thing is, the more restricted programs you can write.

Then the function can get more storage space accordingly. 10，GPUGP .

6. Knowledge about smart phones

Smartphone (also called smart phone, smart phone, English: smart phone) is a sexual title for those mobile phones with stronger computing power and function than traditional mobile phones.

The most commonly used operating systems for smart phones are Symbian (delisted), Windows Phone, Android, IOS and BlackBerry OS, but their application software is incompatible with each other. Smartphones can install third-party software like personal computers, so they are rich in functions and can be continuously expanded.

Smart phones have five characteristics: they have the ability to surf the Internet wirelessly, that is, CDMA 1X or 3G(wcdma, cdma-evdo, TD-scdma) networks or even GSM networks or 4G(HSPA+, FDD-LTE, TDD-LTE) networks that need to support GPRS under CDMA networks. The functions of PDA include PIM (Personal Information Management), calendar keeping, task arrangement, multimedia application and web browsing.

An open operating system has an independent core processor (CPU) and memory, which can install more applications and expand the functions of smart phones infinitely. Humanization can expand machine functions according to individual needs.

According to personal needs, real-time expansion of the built-in functions of the machine, as well as software upgrade and intelligent identification of software compatibility, realize the humanized function of software market synchronization. Powerful: strong expansibility, supporting many third-party software.

Disadvantages: the price is generally high, the usability is poor, and novices need to adapt slowly. For those friends who are not familiar with computers and mobile phones, if you want to play smart phones, it is impossible not to spend some time studying them. After all, today's smart phone is like a miniature personal computer.

Ordinary mobile phones use very humanized 9-core and 12-core interfaces, which is convenient for users to get started. Smartphones can freely customize the interface and be more flexible.

Because of the convenience of smart phones, they quickly became popular all over the world, and the manufacturing cost was higher than that of non-intelligent ones. With the improvement of manufacturing technology and the price reduction of electronic components, the price of smart phones is already very cheap.

7. Mobile phone knowledge encyclopedia

Time to market: July 2009 Network standard: GSM/GPRS/WCDMA/EDGE/HSDPA Applicable frequency: 850/900/1800//900 MHz Weight: 90g volume/volume:108 * 46 */kloc-0. 240*320 pixels, 2.0 inches; Operating system: Symbian v9.3, S60 3rd edition FP2 platform processor: Arm 1 1, 369 MHz memory capacity: 140MB talk time: 2 10/0min standby time: 250 hours native function: music mobile phone 3G mobile phone smart phone camera material: CMOS screen material: TFT appearance style: straight board time to market: April 2009 multimedia entertainment "Bluetooth A2DP stereo" video playback: support 3GP, MP4, RM file headphone jack: 3.5mm headphone jack flash playback: Macromedia Flash Lite 3.0 camera: built-in camera pixel: 2 million pixel sub-camera pixel: supported sensor type: CMOS flash: built-in; LED flash zoom mode: digital zoom photo resolution: multiple photo resolutions choose continuous shooting: support shooting mode: multiple shooting modes choose photo special effects: support photo quality: multiple photo quality choose video shooting: audio and video shooting; QVGA resolution video capture network data "Unicom Customization", "Wireless Modem", "Support for WWW Browsing", "Support for WAP Browsing", "E-mail" and "U Disk Function" Data line interface: microUSB 2.0 interface Bluetooth interface: v2.0, support for A2DP multimedia card expansion: support for microSD card expansion, maximum 8gb Java expansion: Java midp 2./kloc- * * *︹MP3 * * *︹\6508 1; \6508 1; Incoming call picture recognition, scene mode, standby picture, graphic menu, theme mode, file manager, Chinese input, Chinese short message, EMS short message, multimedia short message, short message group, ultra-long short message, voice dialing, TTS text reading, telephone address book, address book group and call record. Recording, alarm clock, calendar, calculator, stopwatch, notepad, memo, calendar, world clock, unit conversion and currency conversion.