Microsoft Lumia 640 dual SIM

The Lumia 640 dual SIM from Microsoft as Smartphone lower middle Checkout offers a bit more features than the Lumia beginners series.Whoever Windows Phone may already or may not reflect emphasis on very specific Android apps can do its complete mobile everyday problems with the Lumia 640th If the fastest possible Internet is important, but you should pay attention to the LTE version to buy. For the same model is also available as a (cheaper) with identical facilities UMTS version available. Overall, the performance is compared to other models in the Dual-SIM mobile test just average, with views of the purchase price but ok.

display

With 5-inch screen and 1080 x 720 pixel resolution can compete with much more expensive mid-range smartphones. The colors are also clear and rich in contrast appears on the display. The viewing angle of the IPS panel is fairly large, with a strong tendency to view faded but. The screen is - unlike in previous cheap Lumia devices - very good fit in the chassis housing. The ratio of the display area to the total size is generally good, the side frame but could be much narrower. The 8,8mm with relatively flat plastic housing provides way represents a significant improvement over older Lumia generations. Thus, the model is in the test well in the hand.

operating system

We have a general over the operating system Windows Phone compiled details. What is fairly new: the digital assistant called Cortana. By "her" you can perform simple voice commands and questions. Who knows Apple's Siri or Google Now, can get a rough picture of the operational mode. The kind of "conversation" has impressed us in the Lumia 640 Dual SIM Test. Because there are not only understood individual commands and not just reeled simple information, but in a limited framework can be even longer dialogues lead, where Cortana detects already amazingly well from the information previously mentioned, what is meant in the later stages with specific demands. The assistant also reminds you of appointments or provides information on traffic jams or weather.You can also restrict Cortana "knowledge" but, if you otherwise get the feeling she knew too much about oneself. A vote "Is Windows Phone better or worse than Android / iOS / BlackBerry?" We can not give - it is partly a matter of taste, but qualitatively the operating system of the Lumia 640 is definitely ideal for normal mobile requirements. However, a criterion in the decision could be the number of apps.Furthermore, one can say that are available for Android and iOS each well above 1 million, while Windows Phone currently kommt.Office on some 300,000 Apps A clear sign that the manufacturer of the Lumia 640 Microsoft is the official office software package "Microsoft Office" is already pre-installed when buying. This can be opened directly on the mobile display the typical Word documents, Excel files, or PowerPoint presentations, view, edit and save. Just dual SIM phones are indeed often purchased to combine a company number and a private number. Since it lends itself to possibly, work on the road in the cafe to do on your phone, on the train or in the office meeting. In addition to the mobile via WLAN is also the local internet. The WLAN standards 802.11 b, g and n can be exploited. In the new, faster ac standard but you can not access. Here is noticeable that this Lumia model is very low and a bit longer on the market.

Dual-SIM Control

Like other WIndows Phone models in the test offers the Lumia 640 Dual SIM - both with and without LTE - a very good control of the inserted SIM card. This is mainly due to the live tiles. Because the Phone tile and the SMS-tile can be separately put both SIM1 and SIM2 for the Start Screen. This one has several advantages:

• 

  Convenient: Separate Phone tiles for SIM1 and SIM2 in Lumia 640 Dual SIM.

  One can see how many calls you have missed separately to SIM1 and SIM2.
• One can see how many SMS arrived on each individual number.
• One can directly tap to call (or to ledges) from the home screen, each desired SIM card and only needs to type the destination number.

At the same time accessible to both numbers

Both phones are available in parallel to receive incoming calls and short messages - or to himself another call or to write. While the phone on a map, the other is, however, not be used simultaneously. This "standby" principle can be avoided by Microsoft's "Smart Dual SIM". This need not necessarily be to ensure that you missed an important call on professional SIM1 during a call, for example on a privately used SIM2.For "smart" by the adjustment can be for both SIM cards each "call waiting" and / or "Forward" set.Whether incurred in their mobile tariff for such diversions fees, but you should check beforehand.

camera

power

The Qualcomm Snapdragon 400 processor is well suited for everyday tasks, but is clearly in the lower middle class. Even the memory meets only basic needs. With 1 GB of RAM, the Lumia 640 has just a quarter of the capacity of the current top smartphones. And the internal memory falls with 8GB compared low from. The most popular apps and simple games are no problem, but when it comes to 3D games or complex computing tasks, you should rather put on other phones - which are quite and look at Microsoft. However, to most markedly higher price.

Technology and mobile Details

property	value
Display / Screen size	5.7 inch Super AMOLED display WQHD
resolution	2560 x 1440 pixels, 518 ppi
operating system	announced Android 6.0 update to 7.0 ()
main camera	12.0 megapixels
front camera	5 megapixel
SIM 1	Nano SIM
SIM 2	Nano SIM
transmission standards	LTE, UMTS, GPRS
Supported frequencies	LTE / 4G: 800/1800/2600 MHz UMTS / 3G: 850/900/1900/2100 MHz GSM / 2G: 1900 MHz
processor	Octa-Core 2.15 GHz
memory	4 GB of RAM 64 GB of internal memory
sensors	Bullets
battery pack	3500 mAh
Dimensions	15.35 x 7.39 x 0.79 cm
weight	169 g
Others