Samsung has just unveiled the fraternal twins – Samsung Galaxy S6 and Samsung Galaxy S6 Edge on Mobile World Congress 2015, which finally discard the sleazy plastic build, appearing with an attractive fusion of sharp metal lines and plenty of glass design. And the S6 Edge competes for the flashpoint with two curved screens. The new phone pair makes a stir with new features, which would push Samsung to regain the top spot in global smartphones war, or, ill reverse the sagging sales?