Notice of Results

2012 FIRST QUARTER RESULTS UNDER IFRS TO BE RELEASED

ON MAY 10, 2012

Αthens, April 25, 2012 - Hellenic Telecommunications Organization SA (ASE: HTO, OTC MARKET: HLTOY), the Greek full-service telecommunications provider, announces that it will release its first quarter 2012 results under IFRS on Thursday, May 10, 2012.

OTE's management will host a conference call at 17:00 (GREECE) / 16:00 (CONTINENT) / 15:00 (UK) /10:00 (EASTERN US) following the release, to review the results.

Details regarding the conference call dial-in and replay numbers as well as the live audio webcast of the conference call, following the results, can be accessed at: http://www.ote.gr/portal/page/portal/OTEGR/OTEMainPage and http://www.ote.gr/portal/page/portal/InvestorRelation/InvestorRelation

OTE Group is Greece's leading telecommunications organization and one of the pre-eminent players in Southeastern Europe, providing top-quality products and services to its customers.

Apart from serving as a full service telecommunications group in the Greek telecoms market, OTE Group has also expanded during the last decade its geographical footprint throughout South East Europe, acquiring stakes in the incumbent telecommunications companies of Romania and establishing mobile operations in Albania, Bulgaria and Romania. At present, companies in which OTE Group has an equity interest employ about 28.474 people in four countries, and our portfolio of solutions ranges from fixed and mobile telephony to Internet applications, satellite, maritime communications and consultancy services.

Listed on the Athens Stock Exchange, the company trades under the ticker HTO. Following OTE's delisting from NYSE, OTE ADSs (American Depositary Shares) trade in the OTC (Over The Counter) market under the ticker HLTOY.

Additional Information is also available on:

http://www.ote.gr/portal/page/portal/InvestorRelation/InvestorRelation

Contacts:

OTE: Dimitris Tzelepis - Head of Investor Relations

Tel: +30 210 611 1574, Email: dtzelepis@ote.gr 

Maria Kountouri - Assistant to the Head of Investor Relations

Tel: +30 210 611 5381, Email: mkountouri@ote.gr 

Kostas Maselis - Senior Financial Analyst, Investor Relations

Tel: +30 210 611 7593, Email: kmaselis@ote.gr

Sofia Ziavra - Financial Analyst, Investor Relations

Tel: +30 210 611 8190, Email: sziavra@ote.gr

Christina Hadjigeorgiou - Financial Analyst, Investor Relations

Tel: +30 210 611 1428, Email: cchatzigeo@ote.gr

Daria Kozanoglou - Senior Communications & Regulatory Affairs Officer,

Investor Relations

Tel: +30 210 611 1121, Email: nkozanoglou@ote.gr

Eftychia Tourna - Communications & Regulatory Affairs Officer, Investor Relations

Tel: +30 210 611 7236, Email:etourna@ote.gr

 Eleni Agoglossaki - Communications & Regulatory Affairs Officer, Investor Relations

Tel: +30 210 611 7880, Email: eagoglossak@ote.gr