 5 general trends should be paid attention to in 2015.The world will be a Mobile-First World

In the big smartphone times, more and more people are put more time on mobile.In the U.S., carriers' shelf-space for devices with 4.7-inch or larger screen displays increased from 4 percent to about a third in 2014 alone, matching a sales growth – larger-screen phones now account for more than one-quarter of all sales, according to NPD Group.