ISTANBUL, January 28 /PRNewswire/ --

- Callers Listen to Advertisements From Mobile Phones and Win With
Turkcell's Tone & Win

Since the launch of Turkcell's Tone & Win (TonlaKazan) in May
2008 as the world's first RingBackTone (RBT) advertising platform, this
loyalty program for subscribers has grown to over 200,000 members, boasting
an unconventional, unique and innovative media channel for advertisers to
garner brand recognition. Using the Tone & Win platform, Turkcell members
select branded content and let their callers listen to a branded RingBackTone
instead of a regular ring tone.

Turkcell Business Development Chief Executive Officer Cenk
Serdar said, "The Tone & Win platform not only integrates a rewarding loyalty
program for our customers with an unconventional new media channel for
brands, it also has reached over 200,000 members since its launch, creating
more than six million monthly impression in six months. Additionally, the
platform is decreasing the churn rates of Turkcell subscribers who are Tone &
Win members by giving free text and minutes in return for sending sms/mms ads
daily. This new ad-funded business model shows great promise and the
potential to surpass other models in mobile marketing."

Turkcell subscribers win airtime or credit depending on the
amount of time their callers listen to their RBT advertisement music. On
average, a Tone & Win subscriber wins 65 units / 20 minutes monthly, while
this number can reach up to 150 units / 40 minutes for some subscribers whose
incoming voice call traffic is above average. While during the beta period
only a limited amount of members were able to register for Tone & Win, it is
now available to all Turkcell subscribers. It is possible to become a member
of Tone & Win through Web, Wap and SMS channels. Members select the
advertisement music of the brand of their choice as the RBT content they want
their social community to listen to.

Fifty different brands have launched 72 campaigns using the Tone & Win
platform with a minimum of two weeks duration since May 7, 2008, including
Coca Cola, Unilever, P&G, Nestle, Warner Bros and major national Turkish
brands such as Garanti, Akbank, Digiturk, Arcelik. At the end of each Tone &
Win campaign, Turkcell offers brands exclusive reports containing members'
demographics, socioeconomic status, total impressions and total branded RBT
seconds listened to by callers.

An example of a successful targeted advertising campaign created through
Tone & Win was the November 2008 launch by Warner Bros of a James Bond 007
Quantum Of Solace branded RBT. Only those Tone & Win members who were between
the ages of 13-54, male, and living in the 26 Turkish cities where the movie
launched, could select this jingle for their social community.

Tone&Win has been shortlisted in GSMA Global Mobile Awards 09'
in "Best Mobile Advertising Service" category while Rob Conway, CEO of the
GSMA commented "To have been nominated from such a high quality field of more
than 450 companies that entered is a tremendous achievement, and we await the
announcement of the winners at the next month's Global Mobile Awards evening
in Barcelona with great interest.Tone & Win was developed with "4play Digital
Workshop," Turkcell's business partner that provides innovative products and
ideas.

"Cost Per Listening" pricing model for advertisers

Tone & Win's performance-based pricing model, Cost Per
Listening (CPL), charges the brand according to the amount of advertising
that has been listened to, thereby providing a completely measurable channel
opportunity.

http://www.tonlakazan.com

Turkcell Mobile Marketing

Turkcell mobile marketing creates targeted, cost-effective and
measurable media integrated with different technologies for corporations
aimed to reach existing or new customers. This makes mobile marketing an
unconventional, effective and interactive media highly preferred by brands.
With permission database reached to 7.5 million subscribers and innovative
products like Tone&Win and Mobile Ticketing, Turkcell mobile marketing has
created 650 mobile marketing projects with 276 brands in 27 different
industries in 2008. As a founding member of the Global Mobile Marketing
Association, Turkcell assumed active roles on the Association's Board and its
committees. Turkcell organized various public relations activities such as
conferences and workshops that target advertisers and media agencies, with
the aim of increasing the marketing sector's awareness of mobile marketing.

About Turkcell

Turkcell is the leading GSM operator in Turkey with 36.3
million postpaid and prepaid customers as of September 30, 2008 operating in
a three player market with a market share of approximately 56% as of June 30,
2008 (Source: The Telecommunications Authority). In addition to 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 605 operators in 201 countries as of
December 22, 2008. Serving a large subscriber base in Turkey with its
high-quality wireless telephone network, Turkcell reported US$5.4 billion net
revenues for the nine months as of September 30, 2008 and US$6.3 billion net
revenues as of December 31, 2007 as per IFRS financial statements. Turkcell
has interests in international GSM operations in Azerbaijan, Belarus,
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, 0.05% by
Cukurova Group, 13.07% by Sonera Holding, 2.32% by M.V. Group and 0.08% by
others while the remaining 33.48% is free float.