As has been discussed before, to have a custom chip built in the technologies used in cell phones, it has to be very high volume to offset the design and tooling costs. An FPGA that meets the low power requirements could stay in the socket indefinitely. They would then have the freedom to make changes quickly as market conditions change.
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.