New super-fast mobile internet services - which would let users watch movies on smartphones or tablets while on the move - may be launched by Vodafone this week.
It is believed Vodafone, New Zealand's largest mobile company, will make an announcement about 4G mobile services at a media conference in Auckland tomorrow morning.
4G - or fourth generation - mobile internet services can offer users much faster speeds than existing 3G networks.
Telecommunications Users Association head Paul Brislen said as well as downloading mobile data quickly, 4G also lets users upload things such as video files at a fast rate.
If Vodafone was announcing a 4G launch, Brislen said, it could create a "bit of an arms race" among mobile companies.
Although indicating an announcement was happening tomorrow, a Vodafone spokesman was unable to say what it was about.
It is not known whether this suspected announcement would be for a trial or a wide-scale 4G rollout.
Telecom started a 4G trial for 100 of its customers in Auckland and Wellington this month.
It plans to launch 4G services to its customers by the end of the year.