The main functions of smart phones

Broadly speaking, smart phones have most functions of PDA, especially personal information management, browser based on wireless data communication, GPS and email. 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. With the support of 3G communication network, the development trend of smart phone is bound to become a powerful comprehensive personal handheld terminal device integrating call, short message, network access and film and television entertainment. Although there is no standard industry definition of "smart", we can define whether it belongs to a smart phone through the following functions:

Operating system: Generally speaking, smart phones are based on an operating system and can run programs.

Software: Almost all mobile phones contain some form of software (for example, the most basic mode is to include an address book or some form of contact assistant), and smart phones will be able to do more work. It allows you to create and edit Microsoft Office documents, or at least view files. It may allow you to download applications such as personal and corporate financial assistants. Or, it allows you to edit photos, plan driving directions through GPS and create a digital music player.

Web access: More smartphones can access websites at a faster speed, connect to 3G data networks, and increase support for Wi-Fi. However, not all smartphones provide high-speed Internet access, but they all provide some form of access. You can use your mobile phone to browse your favorite websites.

QWERTY Keyboard: According to our definition, smart phones include QWERTY keyboards. They will be on the keyboard of your computer-not the alphanumeric keyboard arranged at the top in alphabetical order, where you must use the number 1 to access the keyboard with A, B or C. The keyboard can be hardware (physical keyboard) or software (like touch screen, such as iPhone).

Information: All mobile phones can send and receive short messages. In addition to processing emails, smartphones can also synchronize your personal-and sometimes even your professional-email accounts. Some mobile phones can support multiple email accounts. Others include: access to popular instant messaging services, such as QQ, MSN and AOL's AIM and Yahoo.

In addition, the functions of smart phones also include: mail: Usually, smart phones are designed for business people, but the most important contact method for global business is not phone calls or text messages, but mail, especially in trading companies or global companies. Mail is the main work content that business people deal with in a day, and the first thing smart phones need to support is mail.

Contact: In addition to e-mail, you need to call the contact phone book during the call. Generally, people only keep the phone book on their mobile phones, and the huge address book is quite inconvenient when losing or replacing their mobile phones. Smart people use data lines to synchronize with computers, but the really correct way to use them is through wireless synchronization. No matter how the contacts on the computer or the mobile phone are changed, they can be synchronized effectively.

Calendar: Business mobile phone scheduling is a good function. However, limited by the operability of the mobile phone, few people will arrange everything on the mobile phone, so it is necessary to synchronize with the computer. Support document viewing and writing: In addition to the above, business mobile phones can also process documents in daily work, ensuring that mobile phones become a mobile working platform.

The relationship between smart phone and Pushmail When the mobile phone can communicate wirelessly with the computer, synchronize the calendar and address book, and handle all kinds of office documents, it really releases its intelligence. Pushmail can realize wireless synchronization, which can release all the functions of smart phones and make them become time management tools and mobile platforms.

There are two kinds of PushMail, one is BlackBerry BES service, and the other is Microsoft Exchange service. For example, Shanghai Edith provides Exchange and BlackBerry Pushmail services for individuals and businesses. Both of these services are based on commercial mail systems, such as Exchange service, which can use the mailbox as a working platform to handle mail, calendar, contacts, tasks and documents of the day. The operation in the computer is wirelessly synchronized with the mobile phone, and the content processed by the mobile phone will also be wirelessly synchronized with the company computer when going out. Multi-tasking and copy-and-paste are considered as one of the signs of smart phones. Symbian and MeeGo operating systems can support multi-tasking switching and running programs in the background, but Apple needs to reach the firmware of IOS4 to support multi-tasking function. Windows Phone announced that it will support multi-tasking in February of 20 1 15. Android phone has become the most popular smart phone because of its free and open source code. Smartphone processor =CPU (data processing chip) +GPU (graphics processing chip)+others. The underlying architecture of smart phone processor is ARM, just as we say that the architecture of PC is X86. At the same time, ARM is also a company, providing various embedded system architectures for some manufacturers. For example, the popular Cortex-A8 architecture was launched by ARM, and many high-end flagship smartphone processors are based on this architecture. Common manufacturers of smart phone processing chips mainly include Texas Instruments, Apple, Samsung and Qualcomm.

The development of smart phones needs controls. Developers will encounter the problem of how to display the interface and interaction on the smart phone platform, and the control solves this problem. Compared with traditional devices, smart phones support hand touch, so smart phone control also pays more attention to touch screen mobile devices and design functions. Traditional controls, such as buttons, text boxes and dates, have also increased their support for smart phone platforms. However, as the smartphone platform becomes more and more complex, people's demand is getting higher and higher. The interface is more beautiful, the operation is simpler and faster, and the control is more convenient. There are more controls on smart phones, which makes it easy to develop and program on smart phones. Effectively help users create mobile applications. ⒈ 4G LTE

4G LTE is the future of mobile connection. Without the 4G function, smartphones will fall behind.

4-inch or larger display screen

Once upon a time, a 3-inch display was the standard configuration in the mobile market. However, HTC, LG, Samsung and other companies launched new products in 20 12, and these manufacturers all required their competitors to launch 4-inch or larger display screens. Even Apple is expected to increase the display size.

3. The latest operating system style.

Manufacturers have no excuse to introduce devices without the latest version of the operating system. In the field of Windows Phone 7, mango is a must. So far, at least all manufacturers have recognized this problem and will provide the latest OS (operating system style) products.

4. Cancel the physical keyboard.

Although RIM is one of the few manufacturers who insist on using a physical keyboard, the idea of launching a mobile phone with a physical keyboard is not attractive to many consumers. So in 20 12 years, most mobile phone manufacturers will give up the plan to provide physical keyboards, which is a good move.

Support from a single operator.

Interestingly, Apple is one of the few vendors that provide equipment on multiple carrier networks. Apple's iPhone 4S is provided to AT & amp； Users of operators such as T, Verizon and Sprint. However, major competitors such as Samsung and Motorola offer many models of mobile phones on carrier networks. This is an ironic move, and it is something that Apple is using.

The price is lower.

Many industry observers were surprised when Nokia introduced the Lumia 900 mobile phone for $99.99. They thought that the price of Nokia phones would be 199 dollars of Apple's iPhone 4S. However, the prices of other eye-catching mobile phones launched on 20 12 are also very low. Samsung Focus 2 costs only $50. At this week's CTIA (American Wireless Communication Exhibition), it is expected that there will be many eye-catching mobile phones with low prices. This is an interesting change.

⒎ Quad-core processor

When Samsung launched the Galaxy S ⅲ smartphone, Samsung said that it would be equipped with a quad-core Exynos processor. This is one of the many quad-core processor phones launched on 20 12. 20 1 1 is the year of dual-core mobile phones, and 20 12 is the year of quad-core mobile phones.

⒏NFC function

Despite the mobile payment function, every operating system-based device launched by 20 12 will have the remote payment function. When Isis20 12, a mobile payment solution sponsored by wireless operators, is launched later, more devices will support this service. Some people even say that Apple will provide NFC (Near Field Communication) function for iPhone 5s on 20 12. NFC is a popular function of 20 12.

9 32GB storage spaces

Interestingly, most of the first-class mobile phones launched by 20 12 will be equipped with 32GB of built-in storage. For example, the Samsung Galaxy S III is equipped with 32GB of built-in storage. It is expected that Apple will choose 16GB, and start offering 32GB and 128GB iPhone. The demand for storage seems to be growing. Is the storage capacity of smartphone users actually not enough?

10. Improved camera

As the functions of digital cameras become more and more powerful, the digital cameras built into smart phones will become more and more powerful. In fact, the mobile phones launched by 20 12 will increasingly adopt advanced functions, including 8 million pixels and improved autofocus lens. This makes many people consider taking photos with their smartphones. The improved camera has become a key component of smart phones.

1 1. Positioning and tracking GPS

The Global Positioning System (GPS) was developed by the U.S. Department of Defense and first appeared in mobile phones in the 1990s. It is still the most famous outdoor positioning method. GPS sends the position and time data directly to the user's mobile phone via satellite. If the mobile phone can get signals from three satellites, it can display the user's position on the plane map, and if it is four satellites, it can also display your height.

Other countries have also developed systems similar to GPS, but they do not conflict with GPS. In fact, these systems can make outdoor positioning easier. Russian GLONASS has been put into use, and China's compass is also in the trial stage. Galileo in Europe and quasi-zenith satellite systems in Japan are also under development. Mobile phone chip manufacturers are developing processors that can use multiple satellites to obtain positioning information faster.

12. auxiliary GPS technology

Although GPS works well, it may take a long time. When you are indoors or in a building reflecting satellite signals, you will not be able to locate accurately. AssistedGPS is a combination of tools to help solve this problem. One of the reasons for the long waiting time of GPS is that after the satellite is discovered, the mobile phone needs to download the position information of the satellite in the next four hours to track the satellite.

The complete GPS service will not be started until the information reaches the mobile phone. Operators can send these data through cellular networks or wireless networks, which is much faster than satellite links. GuylainRoy-MacHabee, CEO of RXNetworks, a positioning technology company, said that this can help shorten the GPS startup time from 45 seconds to 15 seconds or less, which is unpredictable.

13. Synthetic GPS

The above-mentioned assisted GPS technology still needs available data network and time to transmit satellite information. Synthetic GPS uses computing power to predict the position of satellites days or weeks in advance. Through the cached satellite data, mobile phone Want Want can identify the satellite position within two seconds.

14.CellID

However, the above-mentioned technology of accelerating GPS still needs to find three satellites to locate. Operators already know how to locate mobile phones without GPS. Operators use a technology called CellID to determine the cellular base stations that users are using and their distance from neighboring base stations. After determining the base station that the mobile phone is using, the operator can know the location of the mobile phone by using the database of base station identification numbers and locations. This technology is more suitable for urban areas covered by base stations.

15. Wireless fidelity

Wi-Fi is somewhat similar to CellID positioning technology, but it is more accurate because the coverage area of Wi-Fi access point is smaller. In fact, there are two ways to determine the location through Wi-Fi. The most common method is RSSI (Received Signal Strength Indication), which uses the signal detected by the user's mobile phone from the nearby access point and reflects it to the Wi-Fi network database. Signal strength is used to determine the distance, and RSSI determines the user distance by knowing the distance of the access point.

16. inertial sensor

If you are in a place without wireless network, inertial sensors can still track your position. Most smart phones are equipped with three inertial sensors: compass (or magnetometer) to determine the direction; The accelerometer reports your speed in that direction; And a gyroscope to determine the steering action. These sensors can determine your position without external data, but only for a limited time, such as a few minutes.

A classic example is driving to the tunnel: if your mobile phone knows your location before entering the tunnel, it can judge your location according to your speed and direction. These tools are usually used in combination with other positioning systems.

17. Barometer

Outdoor navigation on sidewalks or streets either goes straight, turns left or turns right. But for indoors, it is difficult for GPS to make correct positioning. One of the methods to determine the height is the barometer, which uses the principle that the higher the height, the thinner the air.

18. Ultrasound

Sometimes detecting whether someone has entered a certain area can explain what they are doing. This can be achieved by short-range wireless systems, such as RFID (Radio Frequency Identification). NFC (Near Field Communication) began to appear in mobile phones and can be used for checkpoints, but the main purpose of NFC installation by manufacturers is to pay.

19. Bluetooth signal

Using beacons that send signals through Bluetooth can achieve very accurate positioning in specific areas (such as retail stores). These beacons, which are smaller than mobile phones, are placed every few meters and can communicate with all mobile devices equipped with Bluetooth 4.0 (the latest version). HDR photography actually appeared 100 years ago. As early as 1950s, the pioneers of photography at that time had already explored this technology at the conceptual and practical levels-by combining multiple negatives of the same scene with different exposures, photos with a larger dynamic range could be taken. Or simply put, in high contrast scenes, the bright areas of the final film will not be too bright and the dark parts will not be too dark.

Gustav Le Gray's photo at 1865, which was composed of negatives with different exposures. This man is known as "/kloc-the most important photographer in France in the 9th century".

At that time, this shooting method required a lot of time and skill. Today, with the help of digital photography technology, even beginners can easily take HDR photos. In fact, most high-end smartphone camera applications have HDR mode.