Taiwan’s GaAs-based power amplifiers (PA) supply chain players including foundries Win Semiconductors and Advanced Wireless Semiconductor (AWSC) and epi-wafer maker Visual Photonics Epitaxy (VPEC) are pinning their hopes on stable shipments for iPhones and other Apple devices to bolster their business results in the third quarter of the year, as Android handset sales outlook remains bleak, according to industry sources.