one of the reason could be entry of plethora of low priced smartphones from micromax, spice, maxx, karbonn etc. Also sony is not spending much on advertising or marketing as compared to samsung. Low end phones market is still ruled by nokia along with newbies like micromax etc. High end range is captured by HTC, samsung, motorolla..... in the mid segment also samsung and HTC has strong presence. Sony has to come out with unique and affordable value proposition in order to make some mark..