SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of

The Securities Exchange Act of 1934

August 11, 2004

Microcell Telecommunications Inc.

800 de La Gauchetiere Street West
Suite 4000
Montreal, Quebec
H5A 1K3

Registration No. 000-29502

[Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.]

Form 20-F... X ... Form 40-F.........

[Indicate by check mark whether the registrant, by furnishing the information contained in this Form, is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.]

Yes......... No ... X ...

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: August 11, 2004

	Microcell Telecommunications Inc.
By:
	/s/ Jocelyn Cote --------------------------------------------------------------------------------------------- Jocelyn Cote, Vice-President, Legal Affairs and Assistant Secretary

FORM 52-109FT2

CERTIFICATION OF INTERIM FILINGS DURING TRANSITION PERIOD

I, Jacques Leduc, Chief Financial Officer and Treasurer of Microcell Telecommunications Inc., certify that:

I have reviewed the interim filings (as this term is defined in Regulation 52-109 respecting Certification of Disclosure in Issuers' Annual and Interim Filings) of Microcell Telecommunications Inc. for the period ending June 30, 2004;
Based on my knowledge, the interim filings do not contain any untrue statement of a material fact or omit to state a material fact required to be stated or that is necessary to make a statement not misleading in light of the circumstances under which it was made, with respect to the period covered by the interim filings; and
Based on my knowledge, the interim financial statements together with the other financial information included in the interim filings fairly present in all material respects the financial condition, results of operations and cash flows of the issuer, as of the date and for the periods presented in the interim filings.

August 10, 2004

/s/ Jacques Leduc
---------------------------------------------------------------------------------------------
Chief Financial Officer and Treasurer

FORM 52-109FT2

CERTIFICATION OF INTERIM FILINGS DURING TRANSITION PERIOD

I, Andre Tremblay, President and Chief Executive Officer of Microcell Telecommunications Inc., certify that:

I have reviewed the interim filings (as this term is defined in Regulation 52-109 respecting Certification of Disclosure in Issuers' Annual and Interim Filings) of Microcell Telecommunications Inc. for the period ending June 30, 2004;
Based on my knowledge, the interim filings do not contain any untrue statement of a material fact or omit to state a material fact required to be stated or that is necessary to make a statement not misleading in light of the circumstances under which it was made, with respect to the period covered by the interim filings; and
Based on my knowledge, the interim financial statements together with the other financial information included in the interim filings fairly present in all material respects the financial condition, results of operations and cash flows of the issuer, as of the date and for the periods presented in the interim filings.

August 10, 2004

/s/ Andre Tremblay
---------------------------------------------------------------------------------------------
President and Chief Executive Officer

MICROCELL TELECOMMUNICATIONS INC 6-K