2degrees, the country's newest mobile operator, complained to the Commerce Commission after Telecom said it would impose "sim-locking" on customers of its new Skinny brand.
2degrees asked the Commerce Commission to obtain assurances from all New Zealand mobile operators they will not sim-lock their handsets.
"This is not about better handsets - improved competition is already driving down the cost of feature-rich smart phones," said Eric Hertz, chief executive at 2degrees. "This is a cynical move to lock in the most cost-sensitive consumers so they can't make a choice," Hertz said.
Telecom confirmed it will lock the phones of customers who buy its planned 'Skinny' product, forcing them to pay a fee if they want to leave. Customers on its XT network are exempt.
Hertz said customers should have the right to move between providers.