Skyworks Solutions designs radio frequency chips, the components that let phones and connected devices transmit and receive wireless signals. Every generation of cellular standards packs more bands into the same device, quietly raising the RF content per phone. Apple is by far the largest customer, a relationship that brings volume and concentration risk in equal measure. The company works to diversify into automotive connectivity, industrial IoT and infrastructure. Skyworks is fabless in part but keeps key filter manufacturing in-house.