Although Samsung charted out which market gets what SoC driving the Galaxy S 4, it is facing an acute shortage of its own developed Exynos 5 Octa SoC, which is supposed to be driving the phone in a majority of the markets. According to a report by Korean publication ETNews, a vast majority, over 70 percent, of Galaxy S4 inventories getting ready to ship, run Qualcomm's Snapdragon 600.
The report claims that the team responsible for Samsung's Exynos 5 Octa, announced this January, at the 2013 International CES, was unable to iron out yield issues with the chip, leading to the shortage. The Snapdragon 600, which along with the Snapdragon 800, was launched around the same time as the Exynos 5, is not only available in acceptable quantities, but has also scored big design wins with other handset makers. The HTC One runs this chip.