The FCC has passed the Lumia 640, and has kindly also posted some tear down pictures of the handset.
The device specs include a 5 inch 720P screen, is 8.8 mm thick and 145 g heavy, has 1 GB RAM, 8 GB storage, Gorilla Glass 3, has Ambient light sensor, Accelerometer, Proximity sensor, Magnetometer and SensorCore, is powered by a Snapdragon 400 processor and has an 8 megapixel rear and 0.9 megapixel FFC.
The handset will go on sale for EUR 139 for the 3G model and EUR 159 for the LTE model, before taxes and subsidies. The Lumia 640 will be available in glossy cyan, orange and white as well as matte black and will begin a global rollout in April.
See the tear down pictures below.