"Our monthly carrier surveys indicate that December smartphone sell-through was largely in line with store expectations, with supply for the iPhone 6 and iPhone 6 Plus catching up with robust demand, offsetting slightly worse-than-expected sell-through of the Samsung Galaxy GS5 and Samsung Galaxy Note 4," Vinh said. "Decline in Samsung sell-through was partially driven by the initial pause of demand ahead of the launch of the new Samsung flagship Galaxy S6."