Guests test the Samsung Galaxy S4 mobile phones during a event to mark the release of the phone into the Chinese market at a showroom in Beijing April 19, 2013. Samsung, the South Korean giant, now has a 19 percent share of the $80 billion smartphone market in China, a market expected to surge to $117 billion by 2017, according to International Data Corp (IDC). That's 10 percentage points ahead of Apple, which has fallen to 5th in terms of China market share. Picture taken April 19, 2013. To match Insight story SAMSUNG-APPLE/CHINA REUTERS/Barry Huang (CHINA - Tags: SCIENCE TECHNOLOGY BUSINESS TELECOMS) - RTX12JG4 by 写真:ロイター/アフロ