Generally, 28GHz signals have low diffraction, which means it is difficult for them to be available indoors, the company explained.
Latest from Campbell Kwan
With the rollout, Samsung becomes the first new radio network vendor to deploy a commercial network in New Zealand in over a decade.
An extension of the 5G Future X Lab that was built at its Nokia Bell Labs headquarters in New Jersey last year.
The test was conducted in Samsung's 5G lab based in South Korea.
The Singaporean-owned telco aggregated spectrum in the 3500Mhz and mmWave bands on top of existing 4G spectrum band layers to achieve a 'new 5G record'.
Mixed reality use cases relying on 5G can be accessed by consumers, but the infrastructure is still yet to come, Optus 5G head says.
The decision comes a few weeks ahead of the country's 5G auction.
After performing 5G testing of the low band spectrum since November last year.
The spectrum will be auctioned off by the FCC once services rules are finalised.
Around 100 people will be employed to run the factory.