Main functions of smartphones

In a broad sense, in addition to the call function of a mobile phone, a smartphone also has most of the functions of a PDA, especially personal information management and browser, GPS and email functions based on wireless data communication. . Smartphones provide users with sufficient screen size and bandwidth, which are convenient to carry around and provide a broad stage for software operation and content services. Many value-added services can be launched here, such as: stocks, news, weather, transportation, commodities, Application downloads, music picture downloads, and more. Combined with the support of 3G communication network, the development trend of smart phones is bound to become a comprehensive personal handheld terminal device with powerful functions that integrates calls, text messages, network access, and film and television entertainment. Although there is no standard industry definition of "smart", we can define whether it is a smartphone through the following functions:

Operating system: Generally speaking, a smartphone will be based on an operating system that can run programs.

Software: With almost all phones including some form of software (the most basic models include an address book or some form of contact assistant, for example), the smartphone will be capable of doing much more . It lets you create and edit Microsoft Office documents - or at least view archives. It may allow you to download applications such as personal and business financial assistants. Alternatively, it lets you edit photos, plan driving routes via GPS, and create a playlist for digital music.

Web access: More smartphones can access the website at faster speeds, the phone can connect to 3G data networks and has added Wi-Fi support. However, not all smartphones offer high-speed Internet, but they all provide some form of access. You can browse your favorite websites using your mobile phone.

QWERTY keyboard: By our definition, a smartphone includes a QWERTY keyboard. They will be in alphabetical order on your computer keyboard - instead of the numeric keypad at the top, where you have to tap number 1 to enter one with A, B, or C. This keyboard can be hardware (physical keyboard) or software (like a touch screen, such as iPhone).

Messages: All cell phones can send and receive text messages, and while a smartphone is in addition to handling email, a smartphone can synchronize your personal - and sometimes your professional - email accounts. Some phones can support multiple email accounts. Others include: Access to popular instant messaging services such as QQ, MSN, as well as AOL's AIM and Yahoo.

In addition, smartphone functions also include: Email: Usually smartphones are designed for business people, and the main contact method for global business is not phone calls or text messages but email, especially in trading companies or global In a sex company, email is the main work that a business person deals with in a day, and the first thing that a smartphone needs to support is email.

Contacts: In addition to emails, you need to call the contact phone book during the call. Most people only save the phone book on their mobile phones. If the mobile phone is lost or replaced, the huge address book is quite complicated. It is inconvenient. Smart people use data cables to synchronize with computers, but the truly correct way to use it is through wireless synchronization. No matter whether you make changes to contacts on your computer or mobile phone, you can get effective synchronization.

Calendar: Business mobile scheduling is a great feature. However, due to the operational issues of mobile phones, few people will arrange everything on their mobile phones, and at this time they need to be synchronized with the computer. Support document viewing and writing: In addition to the above, business mobile phones can also handle documents in daily work to ensure that the mobile phone becomes a mobile work platform.

The relationship between smartphones and Pushmail: When a mobile phone can wirelessly communicate with a computer via email, synchronize calendars, contacts, and process various office documents, it will truly unleash its intelligence. Pushmail can achieve wireless synchronization. It can release all the functions of a smartphone, making a mobile phone a time management tool and a mobile work platform.

There are two types of PushMail, one is BlackBerry's BlackBerry BES service, and the other is Microsoft Exchange service. For example, Shanghai Aidis provides Exchange and BlackBerry Pushmail services to individuals and businesses. Both services are based on commercial-grade email systems, such as Exchange services. You can use your mailbox as a working platform to handle a day's emails, calendars, contacts, tasks, and documents. Operations on the computer are wirelessly synchronized with the mobile phone, while outside During the process, the content processed by the mobile phone will be wirelessly synchronized with the company's computer. Multitasking function and copy-paste are considered to be one of the hallmarks of smartphones. Both Symbian and MeeGo operating systems can support multitasking switching and background running of programs. However, Apple needs to reach IOS4 firmware to support multitasking function, while Windows Phone It was announced on February 15, 2011 that it would support multi-tasking. Android phones have become the most popular smartphones due to their free and open source nature. Smartphone processor = CPU (data processing chip) GPU (graphics processing chip) others. The bottom layer of the smartphone processor architecture is ARM, just like we say that the PC architecture is X86; ARM is also a company that provides various embedded system architectures to some manufacturers, such as the popular Cortex-A8 The architecture was launched by ARM, and many high-end flagship smartphone processors are based on this architecture. Common smartphone processing chip manufacturers mainly include Texas Instruments, Apple, Samsung, and Qualcomm.

The development of smart phones requires the use of controls. Developers will encounter the problem of how to display the interface and interaction on the smartphone platform, and the control solves this problem. Compared with traditional devices, smartphones support hand touch, so smartphone controls are designed with more emphasis on touch-screen mobile devices. Traditional controls, such as buttons, text boxes, date controls, and other controls have also added support for smart phone platforms. But as smartphone platforms become more sophisticated, so do people's needs. A more beautified interface, simpler and faster operations, and more convenient controls. More controls are available on smartphones, making development and programming on smartphones an easy task. Effectively help users create mobile applications. ⒈ 4G LTE

4G LTE is the future of mobile connectivity. Without 4G functionality, smartphones will lag behind.

⒉ 4-inch or larger display

There was a time when 3-inch displays were the standard in the mobile market. However, companies such as HTC, LG and Samsung launched new products in 2012, and these manufacturers required competitors to introduce 4-inch or larger displays. Even Apple is expected to increase the display size.

⒊ The latest OS style

Manufacturers have no excuse to launch 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 are aware of this problem and will provide products with the latest OS (operating system flavor).

⒋ Cancel the physical keyboard

Although RIM is one of the few manufacturers that insists on using physical keyboards, the idea of ??launching a mobile phone equipped with a physical keyboard is not attractive to many consumers. Powerful. Therefore, in 2012, most mobile phone manufacturers will abandon plans to provide physical keyboards and choose, which is a good move.

⒌ Single Carrier Support

Interestingly, Apple is one of the few manufacturers to offer a device on multiple carrier networks. Apple's iPhone 4S is available to users of carriers such as AT&T, Verizon and Sprint. However, major competitors such as Samsung and Motorola offer many models of phones on one carrier's network. This is a ridiculous move, and something Apple is exploiting.

⒍ Lower prices

When Nokia launched the $99.99 Lumia 900 mobile phone, many industry observers were surprised. They thought the price of Nokia's phone would be the $199 price of Apple's iPhone 4S. However, other high-profile phones launched in 2012 also came at very low prices. Samsung Focus 2 is only $50. At this week's CTIA (American Wireless Communications Show) show, expect to see a lot of eye-catching mobile phones at low prices. This is an interesting transition.

⒎ Quad-core processor

When Samsung launched the Galaxy S III smartphone, Samsung said that the phone would be equipped with a quad-core Exynos processor. This is one of many phones launched in 2012 with a quad-core processor. 2011 was the year of dual-core phones, and 2012 was the year of quad-core phones.

⒏NFC function

Although mobile payment function is not available, every operating system-based device launched in 2012 will have remote payment function. When wireless carrier-sponsored mobile payment solution Isis launches later in 2012, more devices will support the service. Some people even say that Apple will provide NFC (Near Field Communication) function for iPhone 5s in 2012. NFC is a hot feature in 2012.

9 32GB storage

Interestingly, most top-notch mobile phones launched in 2012 will be equipped with 32GB built-in storage. For example, the Samsung Galaxy S III is equipped with 32GB of built-in storage. Apple is expected to add a 16GB option and start offering iPhones with 32GB and 128GB storage capacities. The need for storage appears to be growing. Are smartphone users actually running out of storage capacity?

10. Improved Cameras

As digital cameras become more powerful, so will those built into smartphones. In fact, phones launched in 2012 will increasingly feature advanced features, including 8-megapixel and improved autofocus lenses. This has led many people to consider using their smartphones to take photos. Improved cameras have become a key component in smartphones.

11. Positioning Tracking GPS

The Global Positioning System was developed by the U.S. Department of Defense and first appeared in mobile phones in the 1990s. It is still the most well-known method for outdoor positioning. method. GPS sends location and time data directly to the user's mobile phone via satellite. If the mobile phone can obtain the signals of three satellites, it can display the user's position on the flat map. If it has four satellites, it can also display your altitude.

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. Russia's GLONASS has been put into use, and China's Compass is also in the trial stage. Europe's Galileo and Japan's Quasi-Zenith satellite systems are also under development. Cell phone chipmakers are developing processors that can use multiple satellites to obtain positioning information faster.

12. Assisted GPS Technology

GPS works well, but it can take a long time and won't provide accurate positioning when you're indoors or in buildings that reflect satellite signals. AssistedGPS is a combination of tools to help solve this problem. One of the reasons for the long waiting time of GPS is that when a satellite is discovered, the mobile phone needs to download the satellite's position information for the next four hours in order to track the satellite.

After this information reaches the mobile phone, the complete GPS service will be started. Carriers can send this data over cellular or wireless networks, which is much faster than satellite links. Guylain Roy-MacHabee, CEO of positioning technology company RXNetworks, said that this can help shorten the GPS startup time from 45 seconds to 15 seconds or less, which is not yet predictable.

13.SyntheticGPS

The above-mentioned assisted GPS technology still requires an available data network and time to transmit satellite information. SyntheticGPS uses computing power to predict satellite locations days or weeks in advance. Through cached satellite data, Wangwang Mobile can identify satellite positions within two seconds.

14.CellID

However, the above-mentioned accelerated GPS technology still needs to find three satellites to locate. Carriers already know how to locate a phone without GPS, using a technology called CellID to determine which Cell tower a user is using and how close they are to neighboring towers. After determining which cell tower a phone is using, using a database of cell site identification numbers and locations, the carrier knows the phone's location. This technology is more suitable for urban areas with wide base station coverage.

15. Wi-Fi

Wi-Fi is somewhat similar to CellID positioning technology, but more accurate because the Wi-Fi access point covers a smaller area. There are actually two ways to determine location over Wi-Fi, the most common method is RSSI (Received Signal Strength Indication), which uses signals detected by the user's phone from nearby access points and reflected to the Wi-Fi network database. Using signal strength to determine distance, RSSI uses the distance of a known access point to determine user distance.

16. Inertial Sensors

If you are in a place without wireless network, inertial sensors can still track your location. Most smartphones come with three inertial sensors: a compass (or magnetometer) to determine direction; an accelerometer to report how fast you are heading in that direction; and a gyroscope to determine steering movements. These sensors can determine your location without external data, but only for a limited time, such as a few minutes.

A classic example is when driving into a tunnel: if your phone knows where you were before entering the tunnel, it can determine your location based on your speed and direction. These tools are often used in conjunction with other positioning systems.

17. Barometer

Outdoor navigation on a sidewalk or street is to either go straight or turn left or right. But for indoors, it is difficult for GPS to make correct positioning. One method of determining altitude is the barometer, which takes advantage of the principle that air becomes thinner at higher altitudes.

18. Ultrasound

Sometimes detecting whether someone has entered an area can reveal what they are doing. This can be achieved through short-range wireless systems such as RFID (Radio Frequency Identification). NFC (Near Field Communication) is starting to appear in mobile phones and can be used for checkpoints, but the main purpose for manufacturers to install NFC is for payments.

19. Bluetooth Signals

Using beacons that emit signals via Bluetooth allows for very precise positioning in specific areas, such as within retail stores. These beacons, smaller than a mobile phone, are placed every few meters and are capable of communicating with all mobile devices equipped with Bluetooth 4.0 (the latest version). HDR photography actually appeared 100 years ago. As early as the 1850s, pioneers in photography had already explored this technique on both a conceptual and practical level. By combining multiple differently exposed negatives of the same scene, they were able to create images with greater dynamic range. Big picture. Or simply put, in a high-contrast scene, the bright areas of the final film will not be too bright, and the dark parts will not be too dark.

Photographs composed by Gustave Le Gray in 1865 using negatives with different exposures. This person is known as "the most important French photographer of the 19th century".

At the time, this method of shooting required a lot of time and skill. Today, with the help of digital photography technology, even novices can easily take HDR photos. In fact, most high-end smartphones come with HDR mode in their camera apps.