The Integrated Digital Enhanced Network (iDEN) is a proprietary mobile communications technology from Motorola. It is a TDMA based digital wireless standard. It operates in the 800 MHz, 900MHz, and 1.5 GHz bands. It combines the capabilities of a digital cellular telephone and a two-way radio known as push-to-talk (PTT).
Motorola’s iDEN® technology phones support many other features including Bluetooth, location-based services, MOTOTalk and support for expandable memory (Micro SD. Sprint Nextel is the largest U.S. retailer of iDEN services.
Newer iDEN phones use a SIM card that is compatible with GSM phones for overseas roaming but iDEN is a very different standard from GSM. iDEN phones are not compatible with GSM networks and GSM phones are not compatible with iDEN networks.