The GS3 was launched in 28 markets in EMEA at the end of May. When all is said and done, it will be available on five U.S. carriers as well (AT&T, Verizon, Sprint, T-Mobile, U.S. Cellular). It also launched on Korea on Monday, and the GS3's planned launch in July will see it available on 296 carriers in 145 countries worldwide.
Comparatively speaking, Samsung had previously said the Samsung Galaxy S and Galaxy S II, when added together, had passed 50 million in sales globally. The GS2 alone saw 3 million pre-orders.
Of course, for a single device, those numbers pale in comparison with Apple's iPhone numbers. The company said that it sold 35.1 million iPhones during its most recent quarter.
top cellphone manufacturer, globally.
Given that, and the number of devices that Samsung has launched, and continues to launch, it's clear the Samsung and Apple are dueling for the top spot among handset makers, globally.