Telstra has accused Vodafone of trying to get a "free Christmas present" on its network by supporting the ACCC's domestic mobile roaming proposal.
Telstra chairman John Mullen told the company's annual general meeting on Tuesday that "one of our competitors" was attempting to have regulations in place to close what he described as "a competitive gap".
The Australian Competition and Consumer Commission launched an inquiry in September into whether it should regulate mobile roaming services within the Australian market.
If a wholesale mobile roaming service is declared, then mobile service providers would be able to give their users coverage in areas where they have no network of their own.
{loadposition sam08}Telstra's main competitor, Optus, has backed the country's biggest telco in its stance.
Telstra chairman John Mullen.
Mullen told the AGM that the ACCC proposal would be bad for people who live and work in regional areas.
Telstra chief executive Andy Penn also hit out at Vodafone.
He said the main advocate for mobile roaming was "a foreign company" that had taken a decision not to invest as much as Telstra had.
"A foreign company that is very capable of investing and a foreign company that has argued against roaming in other markets where it suits it to do so,” he said.
"We are hopeful, for the benefit of all Australians that this foreign company’s regulatory campaign will not succeed."