Eircom has said that its revenue for the three months to the end of March fell by 10% to €338m compared to the same time last year.
The company said that earnings before tax, interest and depreciation declined by 11% to €122m, while operating costs were down 4% to €153m.
Eircom said that its retail customer base - which is comprised of fixed and mobile customers - stood at 2,006,00 at the end of March. This figure includes 1,066,000 mobile customers.
Its total customer base - including wholesale customers - stood at 2,406,000.
Retail broadband customers stood at 455,000, down 1% on the same time last year.
The group's mobile customer numbers slipped by 2% in the quarter. Mobile revenues fell by 6% but mobile earnings grew by €5m in the three month period.
The business continues to perform in line with out expectations as we make progress to stem our customer losses, and revenue decline,'' commented Eircom's chief executive Herb Hribar.
But he said that trading conditions remain challenging due to increased competition and the macro economic environment.
Since March, Eircom has launched its fibre broadband network and eFibre, which offers broadband speeds of up to 70Mb per second. The network has been rolled out to over 325,000 homes and businesses and the company said it was on track to pass 600,000 customers by the end of the year.