Turkcell Deploys Mobixell Networks' Rich Media Service Center(TM) Solution.

Mobixell's RMSC to Provide Centralized Multimedia Content Adaptation, Optimization, and Delivery

BOSTON -- Mobixell Networks, a leading provider of mobile multimedia Value Added Solutions (VAS) announced today that Turkcell (NYSE:TKC) (ISE:TCELL), the leading provider of mobile communications services in Turkey, deployed Mobixell's Rich Media Service Center (RMSC). The RMSC will power the operator's multimedia content services and provide a centralized solution for its Service Delivery Platforms (SDP).

"By deploying a centralized Rich Media Service Center, we can offer our customers the latest high-quality multimedia content and fast time to market multimedia services," said Cenk Bayrakdar, Chief Service and Product Development Officer at Turkcell. "We chose Mobixell because we wanted a single, proven solution that could support our service delivery platform, and meet all of our adaptation, optimization needs. Since multimedia services and systems are constantly expanding, we expect to see a rapid return on our investment in a centralized solution."

Mobixell Networks is a leader in the mobile multimedia VAS solutions market. The company's flagship product, Rich Media Service Center (RMSC), provides centrally managed adaptation, transcoding, and optimization.

Turkcell has deployed the RMSC with the following delivery systems: MMSC, Content Management System (CMS), and a Multimedia Push application developed by Turkcell.

"We are pleased that Turkey's leading mobile operator has chosen Mobixell to meet their strategic multimedia delivery requirements," said Amir Aharoni, CEO and President of Mobixell Networks. "The mobile industry understands that with the constant introduction of new applications and handsets, the only way to ensure seamless multimedia delivery is through a central adaptation and optimization system. We view Turkcell as a long-term partner and are committed to their success."

About Mobixell Networks

Mobixell Networks provides advanced multimedia technology and business solutions for mobile network operators. Mobixell's reliable, carrier-grade network-based solutions offer advanced multimedia value-added services including rich media adaptation, transcoding, optimization, super distribution, mobile viral marketing. With Mobixell, operators can increase mobile data traffic, reduce support overhead, and realize faster ROI on next-generation infrastructure. Mobixell's solutions have been deployed at top-tier carriers in five continents and handle rich media content for millions of subscribers every day. Providers rely on Mobixell to ensure delivery of only the highest-quality multimedia - raising user satisfaction, lowering churn, and safeguarding crucial revenue streams from content. Founded in 2000, Mobixell is headquartered in Boston with offices and operations in North America, Europe, APAC, and Japan, and an R&D center in Israel. For more information, visit the company's web site at http://www.mobixell.com.

About Turkcell

Turkcell is the leading GSM operator in Turkey with 30.8 million post-paid and pre-paid customers as of September 30, 2006 operating in a three player market with a market share of approximately 62% as of March 31, 2006 (Source: Telecommunication Authority). In addition to the high-quality wireless telephone services, Turkcell currently offers General Packet Radio Service (GPRS) countrywide and Enhanced Data Rates for GSM Evolution (EDGE) in dense areas, which provide for both improved data and voice services. Turkcell provides roaming with 536 operators in 193 countries as of November 8, 2006. Serving a large subscriber base in Turkey with its high-quality wireless telephone network, Turkcell reported US$4,528 million net revenues as of December 31, 2005 and US$3,497 million net revenue for the nine months as of September 30, 2006 as per IFRS financial statements. Turkcell has interests in international GSM operations in Azerbaijan, Georgia,

Kazakhstan, Moldova, Northern Cyprus and Ukraine. Turkcell has been listed on the NYSE (New York Stock Exchange) and the ISE (Istanbul Stock Exchange) since July 2000 and is the only NYSE listed company in Turkey. 51.00% of Turkcell's share capital is held by Turkcell Holding, 13.29% by Cukurova Group, 13.07% by Sonera Holding, 5.07% by M.V. Group and 0.01% by others while the remaining 17.56% is free float.