NII Holdings spreads its former parent's version of wireless communications beyond US borders. NII Holdings exports the Nextel brand to Latin America, serving customers in Argentina, Brazil, Chile, Mexico, and Peru. Based on Motorola Mobility's iDEN technology, NII's service supports cellular phone, numeric and text messaging, two-way radio, and Internet access. The company also sells mobile handsets, most of which it buys from Motorola Mobility. It also offers BlackBerry devices from Research In Motion. NII Holdings maintains a subscriber base of nearly 8 million users.