Kakao Talk. The free messaging service has a stronghold on the South Korean market but also has worldwide appeal, with a reported 22 million subscribers, including about 4 million foreign customers in Japan and the U.S.

Storms and lawsuits hold Samsung back

Samsung’s global reach is also being hindered in a few ways, from Hurricane Irene to Apple’s own storm of lawsuits. Shipping of the Samsung Galaxy S2 smartphone has been delayed due to the east coast terror Hurricane Irene, while Apple’s managed to get Samsung smartphone sales blocked in a couple of European countries including Germany, and Samsung’s Australian tablet debut has been delayed because of Apple as well. Combined with Verizon’s recent decision to not sell the recently released, Android-powered Galaxy S2, and Samsung’s got a few obstacles to overcome in order to maintain its worldwide hold on the market.