The Kiwi startup only went national in New Zealand last year but is set to launch in Australia this month, and is still eyeing America.
The iPhone maker is within reach of being the world's first trillion-dollar company.
The investment approval allows the company to complete its testing phase and move into a commercial phase.
Datacom's revenue grew 9.3% to $1.27 billion.
The latest mobile and landline numbers for New Zealand's three largest telcos.