2013 might go down as the year that Windows Phone finally hits the mainstream. A new study from Digitimes Research predicts Microsoft (MSFT) is expected to see the highest increase in shipments among all mobile device operating systems next year as Windows Phone devices, including both Windows Phone 7 and Windows Phone 8 models, will see shipments increase 150% to 52.5 million units, good for a 6.1% share of the smartphone market. The firm also predicts that Google’s (GOOG) Android operating system is expected to “solidify its market leadership” in the mobile space in the upcoming year. With continued support from a wide-range of smartphone vendors and higher sales in emerging markets, the platform could see shipments top 600 million units, or 70% of the market, for the first time. Apple (AAPL) is once again expected to take second place with its iPhone accounting for 20% of all smartphone shipments, while Research in Motion’s (RIMM) BlackBerry devices are expected to only account for a 3.7% share.