What is the difference between GSM, GPRS and iDEN?
While GSM, iDEN, and CDMA are considered cell phone networks, GPRS is a data service: Global System for Mobile Communications (GSM) is the wireless technology standard used for cell phones in many countries. To access a GSM network, you must use a GSM Data Roaming-capable phone. General Packet Radio Service (GPRS) is a mobile data service available to users of GSM mobile phones. It provides moderate speed data transfer. In fact, GPRS is often called GSM data roaming when referring to international wireless data services in GSM countries. Integrated Digital Enhanced Network (iDEN) is a wireless technology that allows users to make Direct Connect calls from their cell phone. Sprint Nextel is the largest U.S. retailer of iDEN services, since the Nextel National Network and most Nextel phones use iDEN technology.
