The Commerce Commission says its study of mobile market competition will go ahead.
Earlier this year Communications Minister Simon Bridges wrote to the Commerce Commission asking it to investigate competition in the mobile market.
In the Commerce Commission's words the study aims to "better understand how mobile markets are developing and performing, particularly around the competitive landscape and any emerging competition issues".
Bridges noted that, unlike many other countries, New Zealand does not have thriving mobile virtual network operators.
MNVOs are a feature of many mobile markets around the world. Often run by well-known consumer brands, MNVOs buy wholesale services on existing mobile networks, then sell them to customers without needing to invest in infrastructure.
They can increase competition and give consumers greater choice.
The regulator also mentioned an interest in investigating "fixed-mobile convergence" — a reference to the fixed wireless broadband services offered by Spark and its subsidiary, Skinny.
The commission says it plans to work with the industry before finalising the scope of the study.
In July the Commerce Commission said retail telecommunications would be one of its priorities for 2017-18.
The mobile carriers appear unimpressed. Spark says there is no case for new mobile regulation.
The company's general manager regulatory affairs John Wesley-Smith is quoted in a notice to the NZX on the study. He says: "We have three world class networks delivering prices that are well below OECD averages and three mobile network operators that are ploughing significant investment into an intensely competitive market."
However, last month the NBR carried a report saying Vocus general manager, consumer Taryn Hamilton believes his company cannot grow its mobile business without regulatory intervention. Vocus has an MVNO agreement with Spark.