Notice of Results

2013 FIRST QUARTER RESULTS UNDER IFRS TO BE RELEASED

ON MAY 8, 2013

ATHENS, Greece - April 19, 2013 - Hellenic Telecommunications Organization SA (ASE: HTO, OTC MARKET:HLTOY), the Greek full-service telecommunications provider, announces thatit will release its first quarter 2013 results under IFRS on Wednesday, May 8, 2013.

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 conference call dial-in and replay numbers as well as the live audio webcast of the conference call, following the results release, will follow.

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, having acquired a stake in the incumbent telecommunications company of Romania and establishing mobile operations in Albania, Bulgaria and Romania. At present, companies in which OTE Group has an equity interest employ more than 27,000 people in four countries, and our portfolio of solutions ranges from fixed and mobile telephony to Internet applications, 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.

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