The Lumia 640 runs Windows Phone 8.1 with the Lumia Denim update installed. In other words, it has the most up-to-date version of the operating system available. (Microsoft has said the 640 can be ...
The Lumia Denim firmware update is once again expanding its reach to more Lumia models in India. The download is now rolling out to the Lumia 1520 and the Lumia 930 smartphones in that country.
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