The Microsoft Lumia 640 XL has received a price cut in the US. The AT&T variant now carries a price tag of $99.99, down from the $149.99 it was carrying previously. The phone is powered by a Snapdragon 400 SoC, and sports a 5.7-inch (720 x 1280 pixel resolution) IPS display. RAM is 1GB, while storage is 8GB. In terms of camera, the Lumia 640 XL features a 13MP rear unit and a 5MP front shooter. A 3,000mAh battery is there to keep the lights on. Source
Source: http://www.gsmarena.com/microsoft_lumia_640_xl_drops_to_9999_in_us-news-21069.php