(Telecompaper) The smartphone market will grow just 3.1 percent to 1.48 billion units this year, below the previous prediction of a 5.7 percent growth, according to the latest report from IDC. The figure represents a significant slowdown from growth of 10.5 percent last year and 27.8 percent in 2014, said IDC, which updated its forecast to reflect the continued deceleration in China and mature markets, with Japan and Canada expected to contract by 6.4 percent and 6.9 percent. However, shipments are still set to increase at a CAGR of around 5 percent to 1.84 billion by 2020.