It is a challenge to develop wireless devices that are slimmer and aesthetically appealing, and yet can cover the broad 4G frequency spectrum, and satisfy the CTIA Wireless Association over-the-air (OTA) and specific absorption rate (SAR) criteria. The FEKO complete approach provides the necessary tools to tackle the design of a wireless antenna during the design cycle, from the concept to the final design. This application note provides an overview on the solvers, platforms, and other simulation tools that FEKO has to offer in wireless antenna design and compliance.