Mobile operator 2degrees this morning announced the number of people using its network has climbed 50 percent to 875,656.
Its last update on customer numbers was in March 2011, when it claimed 580,111 users.
Vodafone has close to 2.4 million customers, while Telecom claims just over 2 million.
Chief executive Eric Hertz has previously said 2degrees might break into the black this year, but said yesterday that might be a bit of a stretch for the company.
2degrees entered the market in 2009. Since then, Hertz says, 275,000 New Zealanders have ported their existing mobile numbers to 2degrees.