Alcatel-Lucent is a trusted partner in applications innovation, deployment and ecosystems for the carrier, enterprise and software developer community. An active member in GMSA RCS, Alcatel-Lucent is a leader in the business transformation to Web 2.0 by creating new business models that enhance and optimize the consumer experience across various mobile devices, speed up the introduction of new applications and more effectively leverage network assets. Anchored by a strategy of Applications Enablement, Alcatel-Lucent securely opens up customer networks to provide a rich, trusted and stable Web experience, while ensuring network QoS, optimization and reduced OPEX.

For more information, visit Alcatel-Lucent on the Internet.

Ericsson is a world-leading provider of telecommunications equipment and related services to mobile and fixed network operators globally. Over 1,000 networks in more than 175 countries utilize our network equipment and 40 percent of all mobile calls are made through our systems. We are one of the few companies worldwide that can offer end-to-end solutions for all major mobile communication standards.

We invest heavily in R&D and actively promote open standards and systems. Also reflecting our ongoing commitment to technological leadership, we have one of the industry's most comprehensive intellectual property portfolio containing over 23,000 patents.

http://www.ericsson.com/rcs

Nokia Siemens Networks is a leading global enabler of telecommunications services. With its focus on innovation and sustainability, the company provides a complete portfolio of mobile, fixed and converged network technology, as well as professional services including consultancy and systems integration, deployment, maintenance and managed services. It is one of the largest telecommunications hardware, software and professional services companies in the world. Operating in 150 countries, its headquarters are in Espoo, Finland.

Nokia Siemens Networks, a leader in the IMS-based FMC market, and Nokia, the world’s number one device and client developer, are both founding members of the RCS initiative. Our end-to-end solution has been fully tested and verified for interoperability with prevailing RCS handsets, as well as for interworking with CSP-to-CSP services. The first ever RCS capability demonstration at Nokia World in December 2007 featured Nokia Siemens Networks' infrastructure. Also, the company successfully demonstrated interoperable RCS capabilities at the IMS World Forum in April 2008 in Paris and at Mobile World Congress 2009 in Barcelona.

http://www.nokiasiemensnetworks.com/rcs

France Telecom, one of the world’s leading telecommunications operators, had consolidated sales of 53.5 billion euros in 2008 (25.5 billion euros in the first half of 2009) and, at 30 June 2009, a customer base of 186 million customers in 32 countries.

Orange, the Group's single brand for Internet, television and mobile services in the majority of countries where the company operates, now covers 124.5 million customers. At the first half of 2009, the Group had 125.5 million mobile customers and 13.4 million broadband Internet (ADSL) customers worldwide.

Orange is the number three mobile operator and the number two provider of broadband Internet services in Europe and, under the brand Orange Business Services, is one of the world leaders in providing telecommunication services to multinational companies.

http://www.orange.com

Telefónica is one of the world’s largest telecommunications companies by market cap. Its activities are centred mainly on the fixed and mobile telephony businesses, while its broadband business is the key growth driver underpinning both. It operates in 25 countries and its customer base exceeds 260 million globally. Telefónica’s growth strategy is focused on the markets in which it has a strong foothold: Spain, Europe and Latin America. The Group stands in third position in the sector Telco worldwide in terms of market capitalisation the 1st as an European integrated operator and also the third in the Eurostoxx 50 ranking, composed of the major companies in Europe (June 30th 2009).

http://www.telefonica.com