Samsung Omnia W I8350 is a Windows Phone OS 7.5 Mango based smartphone.Samsung Omnia W has a 3.7 inch capacitive Super AMOLED display,1.4GHz processor,5MP camera,8 GB storage and like other Mango based phone does not support memory card.Samsung has come a long way since touchscreen phones became a trend,and Samsung Omnia W has a fantastic touchscreen.Samsung Omnia W has all the features that you would expect in a Mid-High range smartphone or rather windows based smartphone.