The cost of calling others on a rival mobile phone network continues to get cheaper.
In its third monitoring report of the mobile phone sector, the Commerce Commission says the price gap between calls and texts on the same network, called on-net, and those to rival networks, called off-net, has narrowed, while volumes have risen.
It's been monitoring costs since the middle of last year, when it decided to slash the cost of switching phone calls and text messages between rival networks.
The latest report says the price difference for mobile calls fell 3.4% in the three months to January, while the cost of texts between networks fell 3%.
Voice volumes rose 2% and text traffic rose 2.9%.
The commission says it expects the trends to continue, but will assess if enough progress has been made in July, when it prepares a more comprehensive report, based on 12 months of data.