Whether it's the aggressive rollout of LTE by major operators like AT&T Mobility and Verizon Wireless or the fact that the industry is trying to define what 5G will be, the wireless industry like other segments of the telecom industry, is constantly evolving. As a tribute to innovative companies like these and others serving the wireless industry, FierceWireless is once again chronicling these game changers in their latest annual Fierce15 feature .