OTTAWA -- There was silence on the other end of the line from the country's biggest cellphone companies on Monday after the federal telecom regulator unveiled its new rules for wireless contracts.

Telus, Rogers and Bell have yet to publicly comment on the Canadian Radio-television and Telecommunications Commission's new code of conduct for wireless services.

But the news that wireless customers will be able to cancel their contracts after two years without any penalties -- even if they've signed up for longer terms -- was welcomed by at least one consumer group.

"The wireless code has rules to help wireless customers where it counts -- the bottom line," John Lawford of the Public Interest Advocacy Centre said in a statement.

"It also makes it easier to switch companies because those costs are limited and are clear."

However, the CRTC didn't go as far as an outright ban on the three-year contracts that Canadians vented so much about earlier this year as the national code for wireless services was being drafted.

"We didn't focus on the length of the contract, we focused on the economic relation," CRTC chairman Jean-Pierre Blais said in an interview.

"So, in effect, it's equivalent to those asking for a ban of three-year contract without us actually banning three-year contracts, because what we're saying is the contract's amortization period can only be for a maximum period of 24 months."

In the lead-up to public hearings held earlier this year, the CRTC said it heard a lot of angry comments about three-year contracts.

The regulator also had a backer in the federal Competition Bureau, which supports measures to limit contract length.

"What we were concerned about was ensuring that there was a dynamic marketplace, that is, that people didn't feel entrapped in their contracts when they want to maybe use the offer of a new entrant or a competitor across the street," Blais said.

"So it really is about freeing up Canadians to choose either stay with their current carrier, under renegotiated terms, or go to a competitor."

While the big cellphone companies remained silent, an industry group welcomed some aspects of the new code.

"The CRTC has done its best to find a balanced approach for both consumers and service providers," Bernard Lord, head of the Canadian Wireless Telecommunications Association, said in a statement.

"The commission's decision that the new national wireless code will supersede provincial legislation is a very positive decision in that all Canadians from coast-to-coast-to-coast will have access to the same provisions of the new national code."

However, the association raised concerns about customers being able to walk away from the wireless contracts after two years.

"One area of concern to the industry is the code's requirement of a 24-month amortization of wireless device subsidies," the group said.

"This requirement does limit consumer choice in the marketplace, and could make a customer's up front purchase price of a smart phone more expensive than current offerings."

The association also said there will be "major technology development and costs associated with implementing and complying with the new code."

The ability to walk away scot free from a wireless agreement after two years is one of several provisions aimed at appeasing consumers in the CRTC's new set of national standards for the content and clarity of cellphone contracts.

The CRTC is also capping extra data charges at $50 per month and international data roaming charges at $100 per month to avoid huge, surprise bills.

The regulator will require providers to allow customers to unlock their devices after 90 days, or immediately if they pay the full amount of the device.

Customers will be allowed to return their cellphones within 15 days and specified usage limits if they're unhappy with their service and they will also be able to accept or decline any changes to two-year contracts.

The regulator is also requiring companies to produce contracts that are easy to read and understand.

The code -- which all service providers in Canada will have to abide by -- will apply to new wireless contracts starting Dec. 2.