Iridium Extreme is engineered with more features and unique accessories than ever before, giving people more ways to connect than ever. The Only Phone with Integrated Tracking, Iridium Extreme is the first satellite phone to offer the fully integrated services of customizable GPS, online tracking and programmable emergency notification to personalized contacts.. Iridium Extreme is the first phone ever built with a programmable, GPS-enabled, one-touch emergency SOS button. With a Satellite Emergency Notification Device (SEND) compliant SOS button design, Iridium Extreme will alert your programmed contact of your location and will help create a two-way connection to assist in the response.