Integrated Digital Enhanced Network (iDEN) is a mobile communications technology, developed by Motorola, which provides its users the benefits of a trunked radio and a cellular telephone. iDEN places more users in a given spectral space, compared to analog cellular systems, by using time division multiple access (TDMA). Up to six communication channels share a 25 kHz space; some competing technologies place only one channel in 12.5 kHz.
In the United States there are two iDEN service providers: Sprint/Nextel and SouthernLINC Wireless. Countries which have operating iDEN networks not currently connected with the US include Jordan, Israel, the Philippines, Singapore, South Korea, Saudi Arabia, Japan, El Salvador and China.
Motorola is commited to continued support of iDEN technology despite the Sprint buyout of Nextel and Sprint/Nextel's supposed eventual conversion to Sprint's CDMA system. Nextel has stated they will support iDEN until at least 2010, while other iDEN carriers have no forseeable expiration date for their services.
There is a smaller subset of the iDEN network called "Harmony", which has a maximum limit of 30 sites.

:Countries operating iDEN networks

Argentina: Nextel Argentina
Brazil: Nextel Brazil
Canada: TELUS
Chile
China (selected areas)
Colombia Avantel
El Salvador
Israel: MiRS
Japan
Jordan: XPress, [1]
Korea
Mexico: Nextel Mexico
Peru: Nextel Peru
Philippines: Next Mobile
Saudi Arabia: Bravo Telecom, [2]
Singapore: DNA Communications
United States: Nextel, SouthernLINC Wireless