CBA Institutional Equities analysts Alice Bennett, Nathan Burley and Dominique d'Avrincourt said in a research note that Telstra had delivered "strong subscriber growth" during the first three months of 2010/11.
They said that growth was expected to have continued in the fourth quarter, albeit at a slower pace.
The company's full year guidance was for a high single-digit decline in earnings before interest, tax, depreciation and amortisation (ebitda), flat sales revenue and a 28 cents per share fully franked dividend.
Telstra said in February that adjusted ebitda - its preferred measure - fell 12.5 per cent to A$4.654 billion in the first half.
UBS analysts Richard Eary, Lauren Moran and Eric Choi said 2010/11 earnings were expected to be affected by higher cost of goods sold, as well as marketing and subsidies costs associated with record customer growth.
They said the lower cost of goods sold, lower redundancy costs, and the benefits from Telstra's cost-cutting exercise, Project New, would support improved earnings in 2011/12.
- AAP