Like the UK, the US will also reach majority-smartphone penetration among its population this year, a major milestone for two of the most advanced internet markets in the world. The US remains the second-largest smartphone market worldwide, behind China, totaling 163.9 million users in 2014, eMarketer estimates. The US will retain that status until 2016, when India will take over the second spot. Canada will be soon to follow, with smartphone users surpassing 50% of its population in 2015. Read the rest at eMarketer.