Nhanh Tay Sở Hữu Nokia Lumia Với Giá Tốt Nhất Cùng So8Mobile

Brand name of the company that manufactures the device.

Model name of the device.

Аlternative names, under which the model is known.

Information about the width, i.e. The horizontal side of the device when it is used in its standard orientation.

Information about the height, i.e. The vertical side of the device when it is used in its standard orientation.

Information about the thickness/depth of the device in different measurement units.

Information about the weight of the device in different measurement units.

Estimated volume of the device, calculated from the dimensions provided by the manufacturer. Applies for devices in the form of a rectangular parallelepiped.

Information about the colors, in which the device is available in the market.

Information about the type and form size (form factor) of the SIM card used in the device.

Information about the number of SIM cards, supported by the device.

GSM (Global System for smartphone Communications) was developed lớn replace the analog cellular network (1G), therefore it is referred to lớn as a 2G di động network. It has been improved with the addition of General Packet Radio Services (GPRS) và later via the Enhanced Data rates for GSM Evolution (EDGE) technology.

UMTS stands for Universal mobile Telecommunications System. Based on the GSM standard, it is deemed as a 3G smartphone network standard. It has been developed by the 3GPP & its major advantage is the provision of greater bandwidth và spectral efficiency, due to the W-CDMA technology.

LTE is deemed to be the fourth generation (4G) of điện thoại communications technology. It has been developed by the 3GPP based on the GSM/EDGE & UMTS/HSPA technologies in order khổng lồ increase the speed và capacity of wireless data networks. A further development of the giải pháp công nghệ is called LTE Advanced.

There are several network technologies that enhance the performance of smartphone networks mainly by increased data bandwidth. Information about the communication technologies supported by the device và their respective uplink & downlink bandwidth.

Information about the operating system used by the device as well as its version.

The SoC integrates different hardware components such as the CPU, GPU, memory, peripherals, interfaces, etc., as well as software for their functioning.

Information about the process giải pháp công nghệ used in manufacturing the chip. The value in nanometers represents half the distance between elements that cosplay the CPU.

CPU is the Central Processing Unit or the processor of a mobile device. Its main function is to interpret and execute instructions contained in software applications.

The CPU bits are determined by the bit-size of the processor registers, address buses và data buses. 64-bit CPUs provide better performance than 32-bit ones, which on their part perform better than 16-bit processors.

The instruction mix architecture (ISA) is a set of commands used by the software lớn manage the CPU"s work. Information about the phối of instructions the processor can execute.

Some processors have a level 0 cache memory, which is accessed quicker than the L1, L2, L3, & so one cache memories. Besides achieving better performance, it also consumes less power.

The cache memory is used by the processor in order to lớn shorten the time needed to access data và instructions that a frequently used. The L1 (level 1) cache memory has a small volume, but operates faster than the RAM and the rest cache memory levels. If the processor does not find the data needed in L1, it continues khổng lồ look for it in the L2 cache memory. In some processors the tìm kiếm in L1 và L2 is simultaneous.

The L2 (level 2) cache memory is slower than L1, but has a larger capacity, instead, which allows it lớn cache more data. Just like L1, it is much faster than the system memory (RAM). If the CPU does not find the data needed in L2, it proceeds lớn look for them in the L3 cache memory (if there is such) or in the RAM.

A CPU core is the processor unit, which executes software instructions. Presently, besides single-core processors, there are dual-core, quad-core, hexa-core và so on multi-core processors. They increase the performance of the device allowing the execution of multiple instructions in parallel.

The frequency of the processor describes its clock rate in cycles per second. It is measured in Megahertz (MHz) or Gigahertz (GHz).

GPU is a graphical processing unit, which handles computation for 2D/3D graphics applications. In điện thoại devices GPU is usually utilized by games, UI, clip playback, etc. GPU can also perform computation in applications traditionally handled by the CPU.

Similar khổng lồ the CPU, the GPU consists of processing units called cores. They handle the computation of graphics in various applications.

The frequency is the clock rate of the graphic processor (GPU), which is measured in Megahertz (MHz) or Gigahertz (GHz).

RAM (Random-Access Memory) is used by the operating system & all installed applications. Data in the RAM is lost after the device is turned off or restarted.

Information about the type of RAM used by the device.

Information about the number of RAM channels integrated in the SoC. More channels mean higher data transfer rates.

RAM frequency relates directly khổng lồ the rate of reading/writing from/in the RAM memory.

Information about the capacity of the built-in storage of the device. Sometimes one and the same model may is offered in variants with different internal storage capacity.

One of the main characteristics of the display is its type/technology, on which depends its performance.

In thiết bị di động devices display form size is represented by the length of its diagonal measured in inches.

Approximate width of the display

Approximate height of the display

The ratio between the long và the short side of the display

The display resolution shows the number of pixels on the horizontal & vertical side of the screen. The higher the resolution is, the greater the detail of the displayed content.

Information about the number of pixels per centimeter (ppcm) or per inch (ppi) of the display. The higher the px density, the more detailed and clearer is the information displayed on the screen.

The màu sắc depth of the display is also known as bit depth. It shows the number of bits used for the color components of one pixel. Information about the maximum number of colors the screen can display.

The estimated percentage of the screen area from the device"s front area.

Information about other functions and features of the display.

Sensors vary in type and purpose. They increase the overall functionality of the device, in which they are integrated.

Information about the sensor type of the camera. Some of the most widely used types of image sensors on di động devices are CMOS, BSI, ISOCELL, etc.

Information about the dimensions of the image sensor used in the device. Usually cameras with larger sensors and less px density tend lớn provide better image quality despite the lower resolution.

Pixels are usually measured in microns (μm). Larger ones are capable of recording more light, hence, will offer better low light shooting & wider dynamic range compared to the smaller pixels. On the other hand, smaller pixels allow for increasing the resolution while preserving the same sensor size.

Crop factor is the ratio of the dimensions of a full frame camera"s sensor (36 x 24 mm, which equals the frame form size of a 35 mm film) & the dimensions of the image sensor of the device. The number shown is the ratio between the diagonals of a full frame sensor (43.3 mm) and the sensor in question.

The ISO rating or number is an indicator of how sensitive a camera"s image sensor is to light. Image sensors operate within a specific ISO range. The higher the ISO rating is, the more sensitive to light the sensor is.

The aperture (f-stop number) indicates the kích thước of the lens diaphragm opening, which controls the amount of light reaching the image sensor. The lower the f-stop number, the larger the diaphragm opening is, hence, the more light reaches the sensor. Usually, the f-stop number specified is the one that corresponds to lớn the maximum possible diaphragm opening.

Focal length is the distance in millimeters from the focal point of the image sensor to the optical center of the lens. The 35 mm equivalent indicates the focal length at which a full-frame camera will achieve an angle of view that"s the same as the one of the camera of the điện thoại device. It is measured by multiplying the native focal length of the camera by the crop factor of the sensor. The crop factor itself can be determined as the ratio between the diagonal distances of the image sensor in the 35 mm camera và a given sensor.

The rear cameras of di động devices use mainly a LED flash. It may arrive in a single, dual- or multi-light thiết lập and in different arrangements.

One of the main characteristics of the cameras is their image resolution. It states the number of pixels on the horizontal & vertical dimensions of the image, which can also be shown in megapixels that indicate the approximate number of pixels in millions.

Information about the maximum resolution at which the rear camera can shoot videos.

Information about the maximum number of frames per second (fps) supported by the rear camera while recording video clip at the maximum resolution. Some of the main standard frame rates for recording và playing video clip are 24 fps, 25 fps, 30 fps, 60 fps.

Information about additional software & hardware features of the rear camera which improve its overall performance.

The aperture (f-stop number) indicates the form size of the lens diaphragm opening, which controls the amount of light reaching the image sensor. The lower the f-stop number, the larger the diaphragm opening is, hence, the more light reaches the sensor. Usually, the f-stop number specified is the one that corresponds to the maximum possible diaphragm opening.

Information about the number of pixels on the horizontal và vertical dimensions of the photos taken by the front camera, indicated in megapixels as well.

Information about the maximum resolution of the videos shot by the front camera.

Digital cameras are able to shoot videos at different frames per second (fps). Some of the main standard frame rates for recording và playing video are 24 fps, 25 fps, 30 fps, 60 fps. Information about the maximum possible fps for shooting videos at the maximum possible resolution.

The loudspeaker is a device, which reproduces various sounds such as ring tones, alarms, music, voice calls, etc. Information about the type of speakers the device uses.

Information whether the device has an FM radio receiver or not.

The tracking/positioning service is provided by various satellite navigation systems, which track the autonomous geo-spatial positioning of the device that supports them. The most common satellite navigation systems are the GPS & the GLONASS. There are also non-satellite technologies for locating thiết bị di động devices such as the Enhanced Observed Time Difference, Enhanced 911, GSM Cell ID.

Wi-Fi communication between devices is realized via the IEEE 802.11 standards. Some devices have the possibility to lớn serve as Wi-Fi Hotspots by providing mạng internet access for other nearby devices. Wi-Fi Direct (Wi-Fi P2P) is another useful standard that allows devices to lớn communicate with each other without the need for wireless access point (WAP).

The technology has several versions, which improve the connection speed, range, connectivity & discoverability of the devices. Information about the bluetooth không dây version of the device.

Bluetooth uses various profiles and protocols related to lớn faster exchange of data, energy saving, better device discoverability, etc. Some of those supported by the device are listed here.

There are several USB connector types: the Standard one, the Mini & Micro connectors, On-The-Go connectors, etc. Type of the USB connector used by the device.

There are several versions of the Universal Serial Bus (USB) standard: USB 1.0 (1996), the USB 2.0 (2000), the USB 3.0 (2008), etc. With each following version the rate of data transfer is increased.

Тhe USB interface in mobile devices may be used for different purposes such as battery charging, using the device as a mass storage, host, etc.

Information whether the device is equipped with a 3.5 mm audio jack.

Information about some of the most widely used connectivity technologies supported by the device.

Information about some of the features and standards supported by the browser of the device.

List of some of the most common audio file formats and codecs supported standardly by the device.

List of some of the most common clip file formats and codecs supported standardly by the device.

The capacity of a battery shows the maximum charge, which it can store, measured in mili-Ampere hours.

The battery type is determined by its structure & more specifically, by the chemicals used in it. There are different battery types & some of the most commonly used in điện thoại devices are the lithium-ion (Li-Ion) and the lithium-ion polymer battery (Li-Polymer).

2G talk time is the time period a battery charge will last, if one is constantly talking on the phone in a 2G cellular network.

2G stand-by time is the longest time a battery charge will last, if the device is not used but is constantly connected to the 2G cellular network.

3G talk time is the time period a battery charge will last, if one is constantly talking on the phone in a 3G cellular network.

3G stand-by time is the longest time a battery charge will last, if the device is not used but is constantly connected to lớn the 3G di động network.

Information about some additional features of the device"s battery.

The SAR head rating shows the highest level of exposure lớn electromagnetic radiation measured when the device is held next lớn the ear in a talk position. In Europe, the SAR limit for hand-held điện thoại devices is set to lớn 2 W/kg per 10 g of tissue. This standard is specified by the CENELEC, complies with the IEC standards & follows the ICNIRP Guidelines 1998.

This SAR rating shows the highest cấp độ of exposure to electromagnetic radiation measured when the device is placed at the hip level. The top SAR value for sản phẩm điện thoại devices used in Europe is limited to lớn 2 W/kg per 10 g of tissue. This standard follows the ICNIRP Guidelines 1998 as well as the IEC standards & is determined by the CENELEC.

This SAR rating shows the maximum màn chơi of exposure lớn electromagnetic radiation taken when the device is placed next to the ear. The applicable limit for the US is 1.6 W/kg per 1 g of tissue. In the US the FCC tests & sets the SAR limits for all mobile devices, which are controlled by the CTIA.

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The SAR body toàn thân rating shows the maximum level of exposure to lớn electromagnetic radiation when the device is positioned against the body toàn thân at the hip. The highest SAR value of điện thoại devices allowed in the US is set khổng lồ 1.6 W/kg per 1 g of tissue. It is specified by the FCC & the CTIA follows whether the sản phẩm điện thoại devices comply with this standard.

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