Microsoft today in the MSDN blog Windows Phone 7 announced the standard configurations system occurring adjustment, the biggest change is for mobile Phone manufacturers can need not make any camera, but as a "optional component", and a compass, the gyroscope kind of equipment put together. So some low-end manufacturers can for their entry-level product installation Windows Phone, and to promote the WP7 system coverage ability.
Windows Phone 7’s other system needs not change, so is WVGA (800 x 480) screen, Wi-Fi link, 256 MB RAM, 8 GB storage space.
But "Tango" and "Apollo" release, system configuration requirements will have corresponding adjustment and the specific performance for the low end in Tango, resolution to become 480 x320, the latter need 720 p, LTE 4 G and dual-core processor.