Official Lumia 640 GDR2 update changelog shows a huge number of great improvements by Surur Davids News
News Microsoft’s Reset Protection anti-theft service now fully available for the Lumia 640 and 640 XL
News, Slider Windows Insider app delivers Windows Phone 8.1 Update 2 to any handset which does not support W10M TP [Update: Here’s how to get WP8.1 Update 2 on any device without going for Windows 10 Technical Preview]