VALIMO COMPLETES SUCCESSFUL MOBILE SIGNATURE SOLUTION

05/04/2007


HELSINKI, April 5 /PRNewswire/ -- Turkcell, the leading mobile operator in Turkey with more than
30 million customers, deploys Valimo Wireless' complete mobile signature
solution enabling Turkcell to provide mobile signature as a service to its
customers.


With Valimo's solution, Turkcell's customers can legally sign
documents and confirm transactions, including money transfers and Internet
banking, securely with their mobile phone. The banks, corporations and
government organisations can offer new services and better service coverage
at lower costs directly to individuals. It also protects the users from
phishing and identity theft, substantially reducing the related financial
losses on the Internet and other digital channels.


Turkcell's customers can, for example, sign legal contracts
with third parties using their mobile phone independent of time and place
instead of travelling to the third party office for face to face identity
confirmation and approval with the traditional signature by pencil.


The market for mobile identity management and strong
authentication solutions is in a fast growth phase as governments and
financial institutions are moving toward more secure and user-friendly
SIM-based document signing and transaction validation. Valimo is the market
leader in strong authentication and digital signatures and has been one of
the first and most significant companies to develop mobile signatures as a
successful business.


Valimo delivered to Turkcell a complete solution with wide
range of support, based on Valimo's experience in commercial deployments,
helping Turkcell to develop a new successful business in the market. The
solution includes Valimo's flagship product, Valimo Validator - MSSP, Valimo
Messaging Server and the Valimo Registration Server user registration
solution.


"It's an integral part of Turkcell's strategy to offer our
customers and partners the most advanced services that will ease and enrich
our customers life and connect them to life by creating value added
communication services. Valimo's end-to-end solution and market proven
products met our requirements for our mobile signature service," says Mr.
Cenk Serdar, Chief Executive for Value Added Services, Turkcell .


In accordance with European Directive for Digital Signatures
and Turkish Digital Signature Law, Turkcell Mobile Signature is the
equivalent of a conventional, legally binding signature on a paper contract.
In that respect, the sim card in a mobile phone runs as a signature creation
device - the electronic equivalent of a pen. The combination of the
subscribers' own SIM card and a personal Signing PIN to generate a mobile
signature enables the highest available level of security while maintaining
excellent usability.


"We are proud to be chosen by Turkcell and this successful
delivery reinforces Valimo's position as the market leader in mobile identity
solutions, and the only one-stop source for mobile network operators for
mobile signature solutions," comments Mr Juha Mitrunen, Senior Vice President
of Valimo. The Turkcell mobile signature delivery follows other successful
deliveries in Europe and the Middle East and increases the customer base with
access to Valimo's mobile signature technology by over 500%.


Valimo products are based upon the ETSI (European Telecommunications
Standards Institute) standard for mobile signatures (ETSI MSS).


About Turkcell


Turkcell is the leading GSM operator in Turkey with 31.8
million post-paid and pre-paid customers as of December 31, 2006 operating in
a three player market with a market share of approximately 60% as of December
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 541 operators in 193countries as of
February 26, 2007. Serving a large subscriber base in Turkey with its
high-quality wireless telephone network, Turkcell reported US$4,700 million
net revenues as of December 31,2006 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, 7.46% by
Cukurova Group, 13.07% by Sonera Holding, 5.07% by M.V. Group and 0.01% by
others while the remaining 23.39% is free float.


About Valimo Wireless


Helsinki-based Valimo Wireless is the leading provider of mobile
signature solutions for mobile operators, banks and corporate customers.


Valimo's solutions are used by more than 40 European and Middle Eastern
customers to date, assuring non-repudiation, high data security and high
availability over most network infrastructures and end-user devices. Valimo
is growing strongly with offices in Finland, Sweden, Germany and Turkey.


For more information about Valimo, please visit www.valimo.com.

Valimo Wireless