IDC updated its previous forecast to reflect slowing growth in Asia/Pacific (excluding Japan), Latin America, and western Europe. The slower growth is expected to intensify slightly over the 2015-19 forecast period and is largely attributed to lower shipment forecasts for windows phone as well as 'alternative platforms' (phones running operating systems other than android, iOS, and windows).

China has been the focal point of the smartphone market in recent quarters as its economic slowdown has dampened worldwide growth due to the sheer size of the market. However, IDC maintains its view that China has largely become a replacement market.

As a result, shipment growth in China is only forecast to be in the low single digits. The Middle East andAfrica (MEA) region will see the highest growth in 2015 with shipments expected to increase nearly 50 percent year over year, surpassing 'hot growth' markets like India and Indonesia.

IDC believes the proliferation of the core android platform will continue. Given its global footprint and application/services ecosystem, IDC expects some form of android to hold a dominant share of the smartphone OS space for the foreseeable future.