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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'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. It also offers BlackBerry devices from Research In Motion. NII Holdings maintains a subscriber base of nearly 8 million users.

Ningbo Bird wants Chinese callers to flock to its phones.Ningbo Bird company, also known simply as Bird, manufactures mobile phones primarily for the domestic market in China. It makes a wide range of cell phone models, as well as cordless household phones and wireless Internet adapter cards. Bird sells handsets domestically from regional offices and its products are distributed through authorized dealers and retailers located throughout China.Ningbo Bird company exports phones to Australia, Egypt, Mexico, and the US, among other countries. Bird is a part of the Ningbo Electronics Information Holdings group of technology and electronics companies.

Nujira develops power amplifier technology for the wireless communications industry.Nujira company engineers products for applications including cellular basestations and handsets, point-to-point microwave, and satellite. Nujira's technology is compatible with the leading wireless transmission standards. Four former Tality employees, including managing director Tim Haynes, founded the company in 2002.

XO Holdings gets down to the Xs and Os of business telecom services. The holding company for XO Communications provides telecommunications services to large corporations, small and midsized businesses, government agencies, and other telecom carriers over a network of about 1 million miles of metropolitan fiber. XO Communications offers local and long- distance voice, dedicated Internet access, private networking, data transport, and managed services such as Web hosting and bundled voice and data services. The company has more than 90,000 customers, including wholesale network access provider Covad Communications and network and IT services provider SAVVIS. Billionaire financier Carl Icahn controls 89% of XO.

This company aims to be the best option for the mobile professional in need of a communications solution. Option manufactures and markets broadband wireless equipment, such as data cards, embedded wireless modules, USB modems, wireless routers, and wireless software. Its products are used primarily in mobile phones and laptop computers. Founded in 1986, the firm depends on European customers for nearly three-quarters of its turnover and supplies to such heavyweights as Vodafone (its biggest customer), Telenor, Orange, Bouygues Telecom, and AT&T. Other customers include Acer, ASUS, Samsung Electronics, and Sony.

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