The roaming charges are being paid by roaming customers as part of a plan to cover costs for the cost of switching over.
However, there is no indication when those roaming charges will be returned to customers.
Some customers are also not happy about the new roaming pricing as they believe the cost will be passed on to them.
But the operator has insisted the roaming costs are still part of the plan and it is not possible to reduce them.
Auckland is in the top 10 most expensive cities in the world to call on a mobile phone, according to the latest mobile market research.
This is despite the fact that the city is home to more than 60 per cent of the world’s population.
Auckland is home the largest number of people with internet access.
The cost of internet access is a key issue for some users, with Auckland Council saying it could cost up to $500 for a small household.
The council also wants to see an increase in the cost per gigabyte of data used, something it says is still below the $100 average cost of data across the world.
“It’s time to take a step back and look at what’s happening in Auckland and see what the true cost is to people,” Auckland Council Communications and Infrastructure spokesman Stephen Kavanagh said.
But the company has argued that its own figures showed that the roaming fees paid to its network are paid by customers.
“It is estimated that the cost is around $400 to $800 per customer.”
The real cost to consumers is $600, so there is a cost of $400, $500 to $600 per customer per year, the company said.