I propose here is very cheap and promising model. Touch screen is not here, because my phone is used in the sensor input is better and cheaper. Video cameras are located on each side, the photos to a new level of art. You are shooting reverse side .
Opportunities that now provide such companies as Qualcomm, can significantly reduce the entire scope of work. Designing devices based on processor Sharpdragon-4 it is possible at the lowest cost. Now the cost of Hardware is fully comparable with the usual development of Software. This gave me the opportunity to adjust and significantly reduce development costs.