CDMA phones - what is it? Two-standard CDMA + GSM phones

In this material will be considered CDMA phones, what kind of devices and in which cases without them simply can not do. Also, the characteristics of real models will be indicated and recommendations for their purchase will be given.

Two basic standards of mobile communication

At the moment, the most popular mobile devices are two standards: GSM and CDMA. Each of them is a digital standard. But here the signal transmission in each of these cases is carried out in different ways. In the first case, the frequency range is divided into parts, each conversation occupies only a small part of the spectrum. In the second case, the encoding allows the subscriber to use the entire radio frequency resource. As a result, in this case the quality of communication is an order of magnitude better. But now devices for mobile networks of the first kind have received a wider distribution. This standard was introduced much earlier and at the time of the announcement of CDMA-solutions was already actively used. Now we get the answer to the question: "CDMA phones - what kind of devices are these?" These are devices that are oriented to the application in mobile CDMA networks. Similarly, GSM-solutions are used only in such cellular networks.

Supported devices

Many devices are oriented to functioning in cellular CDMA-networks. First of all, these are mobile phones of the corresponding standard. They have a relatively low level of functionality: conversation, text and multimedia messages. In some cases, this list can be extended by data transfer. So the answer to the question: "What is CDMA phones?" Is the definition: "This is a device that allows you to make calls, send and receive text or multimedia messages or connect to the Internet in CDMA networks." The second kind of devices that can be used in such networks are modems. They can perform only one task - to ensure the transfer and retrieval of data from the global web on a PC. Another type of device is a mobile Wi-Fi router. They do the same thing as modems, but only in this case the presence of a computer is not necessary for the connection. The router creates a wireless computer network to which any device with a Wi-Fi transmitter can be connected. The last kind of devices are smartphones. These are mobile devices, the capabilities of which are expanded by the use of special software. In this case, you can view the video, listen to music, and communicate in social networks ... Even as a mobile wi-fi-router it can be used.

Operators in Ukraine

Until recently, in Ukraine there were quite a few cellular operators that functioned in this standard. This and "Velton", and "Ukrainian Wave", and People.net, and "Intertelecom." But now only the last two services continue to provide services. The first two of them were acquired by Intertelecom, their subscribers joined its cellular network. In turn, People.net due to economic difficulties began to "turn off" coverage, because of this many of its subscribers had to switch to its direct competitor - Intertelecom, which after that became the only national CDMA-operator. The basis of its subscriber base is made up of two-standard CDMA-GSM phones. Odessa is a city from which this operator began his victorious march across the country. Now, its coverage covers most of the country. So owners of CDMA devices can work in Ukraine only in one cellular network.

«Lenovo A330e»

Diagonal display of 5 inches and affordable price - this is the main advantages of this model. The hardware basis of the device is "Snapdragon 200" with two computational modules. Each of them can theoretically accelerate to 1.2 GHz. The memory subsystem includes 512 MB of RAM and 4 GB of integrated data storage. The capacity of the complete battery is 2000 mAh, this is exactly enough for 2 days of use. The operating system in this case is "Android". The price for this device starts from 6000 rubles.

Huawei Y321C

One of the most affordable devices of this standard is the Huawei Y321C CDMA phone. Although this is a smartphone, which operates under the control of "Android". Its computing base is the 2-core Snapdragon MCM8625 with a peak frequency of 1 GHz. The operating memory is 0.5 GB, and the capacity of the built-in storage equals "modest" 4 GB. The diagonal of the display is only 4 inches, and its resolution is 480x800. For autonomy, a battery with a capacity of 1350 mAh is responsible. This is exactly enough for 1 day of work. The price for this device is 5750 rubles.

«Lenovo A805e»

This is the most affordable GSM-CDMA mobile phone with a diagonal of 5.5 inches. Its computing core is the 4-core CPU Snapdragon 410. Each of its computing modules can increase its frequency up to 1.2 GHz. Comfortable work on this device is provided by 1 GB of RAM and 8 GB of integrated storage. The autonomy is answered by a battery for 2500 mAh, this is enough for 1-2 days of battery life. The price of this gadget is 8000 rubles.

HTC T329d

There are also solutions for this digital standard from HTC. Phones CDMA-standard from this manufacturer, although not so often, but still can be found. One of the most affordable models is the HTC N329d. Like all previously considered gadgets, this smartphone is dual-band and can work simultaneously in both CDMA-network and GSM-coverage. At the heart of this device is a 2-core CPU that can dynamically accelerate to 1 GHz. The amount of RAM is 768 GB, and the capacity of the built-in storage is 4 GB. The screen diagonal is 4 inches. The resolution of 800x480 makes it possible to display the output image fairly well. The battery capacity allows you to count on 2 days of battery life without recharging.

The device is equipped with a variety of wired and wireless ways of transmitting information, which allows to fully and fully reveal its potential. You can buy such a device now for 7500 rubles.

Summary

In this article, an answer was given to the question: "CDMA phones - what is this For devices and what are they for? "Also, the characteristics and cost of real models of this type of devices, mobile operators that provide services in this standard in Ukraine, are indicated. Any of these models will be an excellent purchase and allow you to communicate and receive data from the Internet.