The Commerce Commission is to reconsider its plans to let telecommunication operators govern themselves.
In February, the commission recommended that call or text charges be regulated by telecommunication companies.
Since then, Vodafone has introduced a scheme which offers pre-pay customers 200 minutes of calls to any Vodafone mobile or landline for $12 a month.
The Minister for Communications and Information Technology, Steven Joyce, thinks this cheap offer might make it hard for smaller companies to compete.
Mr Joyce wrote to the commission and received a response saying it shared the same view and the matter is now going to be looked at again.
Telecommunications Commissioner Dr Ross Patterson says the commission will prepare a draft reconsideration report, and give interested parties the opportunity to make submissions, before reporting back to the minister in early June.
Telecommunications Users Association chief executive Ernie Newman says schemes such as Vodafone's keep new entrants out of the market.
He says termination charges, which are what telecommunications companies charge for terminating calls or texts from other networks, need to be regulated.
Mr Newman says consumers need more certainty of prices.