In 2011, it was reported that TSMC had begun trial production of the A5 SoC and A6 SoCs for Apple's iPad and iPhone devices. According to reports, as of May 2014, Apple is sourcing its new A8 and A8X SoCs from TSMC and later sourced the A9 SoC with both TSMC and Samsung (to increase volume for iPhone 6s launch) with the A9X being exclusively made by TSMC, thus resolving the issue of sourcing a chip in two different microarchitecture sizes. Apple has become TSMC's most important customer.