Mighty Mobile will be a digital-only service, meaning it won't have physical stores or customer support.
New research found one in 20 mobile phones develop a fault before the five-year mark.
The Commerce Commission has issued a "stop now letter" to the company.
The company says it successfully sent messages, as well as "a couple of emojis".
It has been credited with saving several lives in other countries.
The network will soon extend to the entirety of New Zealand's territorial limit, the company said.
It means you can use two SIMs active on just one phone.
The company will have three plans, with speed being the only difference.
180,000 individuals have visual impairment issues in NZ, costing $2.5 billion a year.
