Vodafone has been trying to shrink its businesses in Australia and New Zealand to focus on European markets, and is fighting regulators that last week moved to block a A$15 billion ($10.4 billion) deal to merge its Australian joint venture business with TPG Telecom.

"An important aspect of our strategy is the active management of our portfolio and deleveraging, which this transaction further demonstrates," Nick Read, chief executive of Vodafone Group, said in a statement.

For Brookfield, which will co-own the business in equal 49% stakes alongside Infratil, the acquisition represents a small venture into a relatively new sector that could be scaled in other jurisdictions.

"This is a unique opportunity for Brookfield," said Stewart Upson, Brookfield chief executive officer of Asia Pacific.

"Data has been one of the fastest growing commodities in the world. We expect this rapid growth to persist for the foreseeable future, driven by greater smartphone penetration, increasing video consumption, the advent of 5G networks and new and evolving uses."

Vodafone New Zealand, one of the largest mobile operators in the country, has about two million mobile customers, compared to about 700 million for parent Vodafone Group as of Dec. 31, 2018.

The British telecoms firm had tried to sell Vodafone NZ to Sky Network Television for NZ$3.44 billion ($2.3 billion) in 2017 but failed to get regulatory clearance because of monopoly concerns.

Since then, Vodafone NZ axed thousands of jobs and restructured itself in preparation to a stock market float that never saw the light of the day.

The world's No.2 mobile operator last week said it would fight a regulatory restriction to merge its Australian operations with internet firm TPG, as it steps up its battle to gain regulatory approval for its Liberty Global cable networks deal.

"This move is consistent with (Vodafone's) strategy to exit assets in this part of the world and their pursuit of the TPG merger," Credit Suisse analysts told clients in a note.

On completion of the sale, Vodafone said it would enter into a deal with Vodafone New Zealand to allow it to use its brand name and certain services.

The sale is still contingent on regulatory approvals, including clearance from the Commerce Commission and the Overseas Investment Office, the companies said in separate statements.

New Zealand firm Infratil said in a statement the acquisition was "strategically and financially compelling" for its shareholders. It said it expected the conditions, which must be met within eight months of signing, will be satisfied by August, and completion will occur by Aug. 31.

The deal is expected to be funded with a NZ$1 billion contribution from each party, with Infratil appointing UBS Group to raise NZ$400 million in new equity. It will use NZ$400 million in new acquisition debt to fund its part of the deal, the company said.

Brookfield has engaged about 5 lenders to back its purchase, including The Bank of Tokyo-Mitsubishi UFJ, Ltd and Australia and New Zealand Banking Group, according to market sources.

Brookfield, ANZ and MUFG did not immediately return requests for comment.

($1 = 1.5232 New Zealand dollars)

(Reporting by Praveen Menon in New Zealand and Paulina Duranin Sydney; Additional reporting by Sangameswaran S and Rishika Chatterjee in Bengaluru; Editing by Grant McCool and Stephen Coates)

By Praveen Menon and Paulina Duran