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Sony Ericsson Mobile Communications wants to build a better voice trap. The joint venture between Japan-based consumer electronics maker Sony and Sweden-based Ericsson combines the cell phone operations of both companies. It was established to draw on the wireless technology of Ericsson, the world's leading maker of wireless network equipment, and Sony's expertise in developing popular consumer gadgetry; the companies phased out their separately-branded phones in favor of co-developed models. Sony Ericsson is squared off against such cell phone stalwarts as Nokia and Motorola, as well as Samsung. Sony and Ericsson each own half of the venture, which was founded in 2001.

Spectrum Signal Processing's devices and software address a spectrum of signal processing needs. The company offers signal processing subsystems and software-defined radio transceiver devices used in a variety of applications, including cellular base stations, signals intelligence, military communications, and test and measurement equipment. Spectrum discontinued its line of voice-over-packet products, which were designed for telecommunications functions. Top customers include Agilent, General Dynamics, Lockheed Martin, Raytheon, and the US Department of Defense. The company has offices in Canada, the UK, and the US. Spectrum Signal Processing is a unit of Vecima Networks.

Spring Communications jumped headfirst into the mobile communications business in 2001 as a retailer of mobile phones and service. The company provides wireless communications products and services to more than 1 million customers in Utah and Colorado. Now an authorized AT&T retailer, Spring Communications sells a variety of phones, accessories and services including voice, SMS, and high- speed wireless data services through its chain of about 75 retail stores. The company was founded in 2001.

Sprint Nextel offers a comprehensive range of wireless and wireline communications services bringing the freedom of mobility to consumers, businesses and government users. Sprint Nextel served more than 48.8 million customers at the end of the third quarter of 2010 and is widely recognized for developing, engineering and deploying innovative technologies, including the first wireless 4G service from a national carrier in the United States; offering industry-leading mobile data services, leading prepaid brands including Virgin Mobile USA, Boost Mobile, Common Cents Mobile and Assurance Wireless; instant national and international push-to-talk capabilities; and a global Tier 1 Internet backbone. Newsweek ranked Sprint No. 6 in its 2010 Green Rankings, listing it as one of the nation’s greenest companies, the highest of any telecommunications company.

ST-Ericsson is a world leader in development of wireless platforms and semiconductors. More than half of all mobile phones in use today are enabled by ST-Ericsson’s products and technologies – bringing smarter communication, mobile entertainment, as well as benefits of access to mobile and broadband connectivity to people around the globe.ST- Ericsson is unique in its ability to deliver state-of-the- art platforms, integrating mobile multimedia and connectivity for GSM, EDGE, WCDMA, HSPA, TD-SCDMA and LTE. The company is a leading supplier to the top handset manufacturers, as well as to other exciting industry leaders, including mobile operators and device manufacturers.

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