Lumia 640 XL LTE Dual SIM, a Windows Phone 8.1 phone upgradeable to Windows 10, from Microsoft!

The Lumia 640 XL LTE Dual SIM Windows Phone 8.1 smartphone, which supports a free upgrade to Windows 10, is now available from Microsoft.

The "Lumia 640 XL LTE Dual SIM" is a dual-SIM
Windows Phone 8.1 smartphone with a 5.7-inch display (1,280 x 720 pixels) and Snapdragon 400 (operating clock: 1.2 GHz/quad core).

As mentioned above, it is upgradeable to Windows 10 and can be upgraded for free after Windows 10 is released. The Lumia 640 LTE Dual SIM and Lumia 430 Dual SIM were the first smartphones to be released that support upgrades to Windows 10.

The main specifications are as follows:Windows Phone 8.1 OS (free upgrade to Windows 10 supported), Qualcomm "Snapdragon 400" CPU (operating clock: 1.2GHz/quad-core). The display is a 5.7-inch IPS LCD display (1,280 x 720 pixels).Memory is 1 GB and internal storage is 8 GB. Other features include wireless LAN (IEEE 802.11b/g/n), front (5 megapixel)/rear (13 megapixel) camera, microSD card slot (up to 128 GB), Bluetooh 4.0, and GPS. Communication systems supported are LTE (1/2/3/4/5/7/8/12/17/20/28/38/40), WCDMA (1/2/4/5/8), and GSM (850/900/1800/1900MHz). The in-stock models are available in black, white, orange, and cyan.

The unit measures 157.9 mm high x 81.5 mm wide x 9 mm deep and weighs 171 g.