About 6500 frontline police will be issued with smartphones by the middle of next year.
Police Minister Anne Tolley said 3900 staff would also be issued with computer tablets, like iPads.
The technology would create about 520,000 more frontline hours a year.
Prime Minister John Key said the changes were similar to the move to online banking and would save time and allow police to be out in the community.
Police will invest $4.3 million capital expenditure and $159m operating expenditure on the technology between now and 2024.
Tolley said police around the country had been "hanging out" for better technology.
"This is an exciting day for the New Zealand Police," she said.
A poster at the launch of the smartphone use said "radio busy? No worries! Access the info you need through your device".
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