**EXHIBIT 12.1**
**CERTIFICATION**
I, Nikolaos Varsakis, Chief Executive Officer of STET Hellas TelecommunicationsS.A., certify that:
1. I have reviewed this annual report on Form 20-F of STET HellasTelecommunications S.A., (the “company”); 2. Based on my knowledge, this report does not contain any untrue statementof a material fact or omit to state a material fact necessary to make thestatements made, in light of the circumstances under which such statementswere made, not misleading with respect to the period covered by thisreport; 3. Based on my knowledge, the financial statements, and other financialinformation included in this report, fairly present in all materialrespects the financial condition, results of operations and cash flows ofthe company as of, and for, the periods presented in this report; 4. The company’s other certifying officer(s) and I are responsible forestablishing and maintaining disclosure controls and procedures (asdefined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internalcontrol over financial reporting (as defined in Exchange Act Rules13a-15(f) and 15d-15(f)) for the company and have:
 (a) designed such disclosure controls and procedures, or causedsuch disclosure controls and procedures to be designed under oursupervision, to ensure that material information relating to thecompany, including its consolidated subsidiaries, is made known to usby others within those entities, particularly during the period inwhich this report is being prepared;  (b) designed such internal control over financial reporting, orcaused such internal control over financial reporting to be designedunder our supervision, to provide reasonable assurance regarding thereliability of financial reporting and the preparation of financialstatements for external purposes in accordance with generallyaccepted accounting principles;  (c) evaluated the effectiveness of the company’s disclosurecontrols and procedures and presented in this report our conclusionsabout the effectiveness of the disclosure controls and procedures, asof the end of the period covered by this report based on suchevaluation; and  (d) disclosed in this report any change in the company’s internalcontrol over financial reporting that occurred during the periodcovered by the annual report that has materially affected, or isreasonably likely to materially affect, the company’s internalcontrol over financial reporting; and
Exhibit 12.1
 

 

5. The company’s other certifying officer(s) and I have disclosed, based onour most recent evaluation of internal control over financial reporting,to the company’s auditors and the audit committee of the company’s boardof directors (or persons performing the equivalent function):
 (a) all significant deficiencies and material weaknesses in thedesign or operation of internal control over financial reportingwhich are reasonably likely to adversely affect the company’s abilityto record, process, summarize and report financial information; and  (b) any fraud, whether or not material, that involves management orother employees who have a significant role in the company’s internalcontrol over financial reporting.   Date: June 17, 2004 **/s/ NIKOLAOS VARSAKIS**  **Name: Nikolaos Varsakis** **Title: Chief Executive Officer**
Exhibit 12.1