Apple Iphone takes it again.

  As one of my all time favorite phones, iphone 4S was the top selling smartphone at all three of its U.S. carrier  AT&T, Verizon and sprint. However, the Galaxy series of Samsung phones proved to be its toughest competitor. As the craze for iphone is growing enormously each day, T-mobile, one of the four major carrier in U.S. is also planning to tie a knot with apple but it is yet to be decided.