The display type is the same for all models (the diagonal is different), but the main cameras of the 640 and 640 XL are different: 8 Mp and 13 Mp matrices, f / 2.2 and f / 2.0 optics, respectively. The basis for the devices of the Lumia 640 family is the SoC Qualcomm Snapdragon 400, all smartphones are equipped with 1 GB of RAM 8 GB of flash memory. Some of them were in stock, others were available by reservation only. For all variants of the smartphone, several body colors are available: white, black, red and blue. Further in the text of the review, the abbreviation 'DS' means support for two SIM-cards. Why market identical smartphones with support for one or two SIM card slots with the same price tags at all? After all, it is clear that, all other things being equal, buyers will give preference to models with support for two SIM-cards.īe that as it may, at the time of preparation of the review on the Microsoft website there was information about only four variants of the smartphone: 640 LTE, 640 DS LTE, 640 DS 3G and 640 XL DS 3G. The release of four pairs of smartphones with the same price and the only difference in the number of SIM card slots does not make the process of choosing a mobile companion any easier. Considering that all smartphones will be sold at the same time, and the options with one and two SIM-cards will have the same price, then the question involuntarily arises: what, in fact, were Microsoft marketers thinking? The Lumia lineup is already overflowing with devices, and you can only figure out how one of them differs from the other if you read the lists of characteristics and compare them line by line.

The younger model Lumia 640 is equipped with a 5 'screen, while the Lumia 640 XL has a slightly larger screen - 5.7'. Also presented to the public were four variants of the Lumia 640 XL with a similar combination of distinctive features.

Four variants of the Lumia 640: single SIM and 3G, single SIM and LTE networks, with two slots for SIM-cards and support for 3G networks, with two slots and LTE. The range of 'Windows backgrounds' has been expanded with the following models.

Sd card for windows phone