Previously, internal memory should be more than 4GB for the Android platform, but not a problem for the Microsoft platform. Other specifications are such devices must use a Qualcomm chip. But after the Microsoft Conference at Shinagawa Japan Conference, Microsoft has to change even though provided for the lower classes have the following requirements:
The internal memory of 2GB or higher, CPU is not specified, 3 Megapixel camera, MicroUSB, 3.5mm jack, capacitive touch screen 4-point or multi-touch, Sensor - A-GPS, Akselometer, Compass, proximity. The biggest change seems on an unspecified processor, which will allow more options for the vendor.