Apple is turning to Samsung for more parts in future production runs of the iPhone 6, sources tell Business Korea. Beginning this week, new runs will reportedly use batteries manufactured by Samsung SDI. More significantly, though, Apple is said to be considering replacing Toshiba TLC NAND flash storage with a Samsung equivalent. Toshiba NAND is currently believed to be the only kind used in 128GB iPhones, and some reports have linked it to occasional device crashes. Toshiba, SanDisk, and SK Hynix are allegedly producing the storage for 64GB models.