Samsung will manufacture 28nm Qualcomm Snapdragon chips

4Yes, you read that right. Samsung, one of Qualcomm's main competitors in the business with mobile silicon, is going to help its rival produce the 28nm Snapdragon S4 SoC.

The reason for this is that Qualcomm's current manufacturing partner, Taiwan Semiconductor Manufacturing, better known as TSMC, can't keep up with the demand. As a result, Qualcomm has reached out to the biggest players in the business for help - United Microelectronics (UMC) and Samsung.
UMC is said to start producing the 28nm Snapdragon S4 chips in Q4 of this at the very earliest. However, it's unknown when Samsung will chime in and start the manufacturing process.
One thing is certain though - Samsung isn't happy that its own Exynos chips aren't as preferred as Qualcomm ones in the US because of their lack of LTE support, and more specifically the 700MHz band. As a result, it's swaps them for Qualcomm's Snapdragon S4 solution in order to compete in the US market.
Source | Via