Phones with two radio modules for "Android"

Two SIM-cards in a modern smartphone, perhaps, a standard that is not neglected even by eminent market leaders such as Samsung. Even conservative Apple has similar developments. Often, such devices are confused with phones equipped with two radio modules, in fact, it's not about ordinary phones on two SIM cards. Two radio modules are an opportunity to use each of them at a time. Most devices, unfortunately, allow each SIM card to be used only alternately, while the second one is in the standby mode.

Technologies: DSDS and DSDA

Almost all, without exception, phones, now on the market, work with two SIM-cards in the DSDS (Dual SIM-Dual Standby) mode, which implies the alternate work of each of them. Both SIM cards adopted in the gadget use one radio module for communication, which means that making a call using one of them will not be able to receive a call on the other. The same goes for the Internet, talking on the phone using one SIM card, it will be impossible to use the mobile Internet for another one.

In the case of DSDA (Dual SIM - Dual Active), the situation is directly opposite, cell phones with two radio modules are able to interact with each SIM card in parallel, without interrupting each other's work.

Phones with two radio modules: pros and cons

Of course, such devices are not acquired from idle interest, they have a number of advantages that draw attention to themselves:

• A phone with two active radio modules allows its owner never to lose touch. Where the SIM card of one operator can be powerless, the card of another will perfectly cope, therefore the presence of two simultaneously functioning radio modules favorably affects the availability of the user as a subscriber.
• Another advantage of these gadgets is the more stable operation of the mobile Internet, which does not turn off even in the case of a conversation on one of the SIM-cards.
• Naturally, mobility. Two SIM-cards, together with two radio modules permanently eliminate the need to have and carry two phones with them.
• The last in the list, but not the last in value plus - the opportunity to combine the advantageous conditions of two different operators. Schemes can be a great many, because each operator has its own conditions. In addition, many people like to travel and will not do without an additional SIM-card in addition to the main one.

The rainbow pattern, described above, spoils several shortcomings:

• First, phones with two radio modules require high spending in production, components are more expensive, the process of assembly and optimization is much more difficult.
• Secondly, the radio module is a complex device and at the same time the most demanding in the phone (after the display). Both facts lead to inevitable losses in autonomy, forcing to constantly live near the outlet or carry a portable battery.
• Third, there are studies that claim that radio waves negatively affect the human body, lead to the development of cancer. The presence of two radio modules in the phone is the same as keeping two phones near the head at a time. Many believe that this way you can literally fry the brain.

Fall of supply

Obviously, the number of phones supporting DSDA is incomparably small, compared to telephones, this technology is not supportive. There is an opinion that such devices were banned in the European Union due to excessive radiation of such smartphones that do not meet the standards of the countries that make up the union. There is also some theory of conspiracy of operators, supposedly they do not want to see a competitor's SIM card in one phone next door. Anyway, the market can not boast a rich assortment of DSDA smartphones, but a pair of diamonds can still be found.

HTC Desire 700

Taiwanese office HTC, perhaps the most long-suffering in the smartphone market. Once a thriving brand, for the past 5 years has lost everything: money, fame, reputation. Nevertheless, HTC continues to produce devices, has its own unique, and most importantly recognizable style.

Desire - a symbiosis of style and level of assembly of high class, with the "iron" of the budget class. The price for all this goods varies within the average.

On the front panel of the Desire 700 is a large 5-inch display with a resolution of 960 at 540 (the number of dots per inch is 220). The heart of the smartphone was, atypical for the manufacturer, the chip Spreadtrum Shark with a clock speed of 1200 megahertz. Also, under the hood of the smartphone, 1 gigabyte of RAM and 8 gigabytes of main memory were scrambled (there is support for memory cards with a capacity of up to 64 gigabytes). Not impressive and the volume of the battery, at a fairly impressive size, the gadget could fit the battery only for 2100 milliampere hours.

Network standards are supported: GSM and HSDPA

HTC One M7 Dual

Another gadget about the Taiwanese manufacturer, this time the flagship. Model M7 came out not so long ago, therefore it is more than relevant and advanced.

On the front of the M7 took a fairly large 4.7-inch display with a high resolution of 1920 by 1080 points (the number of dots per inch - 469), with technology Super LCD. For performance meets the popular processor from Qualcomm, operating at a frequency of 1700 megahertz. The amount of memory exceeds that of the Desire 700 twice: 2 gigabytes of RAM and 32 gigabytes of ROM. Inside the battery is installed for 2300 milliamp hours.

The firm "chip" of the device became the dynamics Boom Sound, which allows you to play high-quality stereo sound directly through the speakers of the smartphone. Also a distinctive feature is a 4 megapixel camera with double pixel technology for high-quality shooting in the dark.

Network standards are supported: GSM and WCDMA

Given the fact that mobile phones with two radio modules have gone out of the ordinary, a similar solution from HTC looks very worthy and attractive.

Huawei Honor 7

The manufacturer of smartphones from China, with a hard-to-pronounce name, has recently begun to expand into the Russian market and the CIS market. The brand is actively promoted on the Internet, popularized by cellular operators, and heated by all these eloquent CEO, promising to sweep away all competitors in the coming years. Among other things, Huawei love phones with two radio modules, the list of which in the company's assortment is quite extensive.

One of the best gadgets, smoothly balancing between price and quality - Huawei Honor 7, released in the middle of last year. The phone has a large display with a diagonal of 5.2 inches and a resolution of 1920 by 1080 pixels. Behind him lies the power of the company's chip Silicon Kirin 935 with a frequency of up to 2200 megahertz. Pleases and the amount of memory, which the Chinese have never stinted, 3 gigabytes of operational and up to 64 main. Another argument in favor of Honor 7 is a large battery with a volume of 3100 milliamps of hours.

As for the supported communication standards, the situation here is very ambiguous, as each model is supplied with a unique set of radio modules designed for a particular market.

ASUS ZenFone 2

The leader of this list is definitely the best phone with two radio modules for "Android." The ASUS product probably does not look like a flagship, but it can catch on with its inner beauty, the most powerful technical component.

ZenFone 2 has the largest display in the collection, a giant, saturated, 5.5-inch capacitive screen with a resolution of 1920 by 1080 pixels, protected by a third generation Gorilla Glass coating. High performance smartphone provides a processor from Intel, which has a 64-bit architecture and 4 cores, each of which has a clock speed of 1800 megagrets. The amount of RAM in 4 gigabytes allows you to actively use many, one-time applications running, without the threat of unloading them from memory and data loss. 32 gigabytes of main memory can be supplemented with another 64 gigabytes, a MicroSD card. Long battery life from a single charge supports a battery with a capacity of 3000 milliampere hours. Complement the picture of two cameras: the rear of 13 megapixels and frontal at 5.

Network standards are supported: GSM and HSDPA

Zopo ZP980

Option for those who prefer devices simpler. The Chinese brand Zopo looks more like some kind of fake, but nevertheless deserves attention, since it has two radio modules.

The first thing that catches your eye is the impressive diagonal of the display (5 inches) and resolution (1920 by 1080 pixels). In this case, the device retains a fairly compact size. Unfortunately, this is all that can impress this budget Chinese. The device is a chip from MediaTek with a clock speed of 1200 megahertz, a small amount of RAM, only 1 gigabyte. The amount of internal memory is also not impressive, 16 gigabytes with the possibility of expansion due to memory cards. The device turned out to be thin, so there was no place for a large battery, the owners of the gadget will inevitably have to put up with a battery, the volume of which is 1860 milliamps of hours.

In general, the Zopo ZP980 phone is the choice of those who are not ready to spend money on the flagship and are not afraid to order phones on the network.

External DSDA modules

This solution is applicable to devices from Apple. Despite the fact that on the Internet from time to time flashes of rumors and patent applications relating to the support of two SIM-cards in the iPhone, to date, there is none. To help the disadvantaged came the Chinese with their next know-how, bearing the name of NeeCoo Me 2.

The device is a small unit in which there are two radio modules and two slots for SIM-cards. The gadget communicates with the iPhone via Bluetooth and allows making calls from two different SIM cards. Calls can be made even if the SIM card is not in the smartphone itself, which means that NeeCoo Me 2 is suitable for all gadgets running iOS, including the iPad.