Optus Wholesale has announced that it will be providing its mobile network for the newest entrant in the Australian mobile virtual network operator (MVNO) market, TravelSIM.

Making the announcement at MVNO World Congress in Madrid on Thursday, Optus said TravelSIM has been providing Australian travellers with "affordable international roaming options" for a decade already.

"TravelSIM is a truly successful Australian business, and we're incredibly proud to be helping enable them to expand their services into a market they know well," Optus Wholesale MD Stuart Bird said.

"Optus Wholesale has long been an advocate for competition and value in the Australian market, and we're looking forward to continuing this through new and existing partnerships."

The announcement came almost a year after Optus began wholesaling its 4G network for the next five years to niche MVNO Moose Mobile[1], which targets the youth market by selling refurbished iPhones and Android phones at low prices and became a carrier by bundling SIM services alongside the handsets.

VP of Sales and Marketing for Optus Wholesale John Castro at the time said the partnership with Moose Mobile showed "Optus' commitment to diversifying its customer base".

"We are here to deliver mobile services to a range of wholesale partners, particularly companies like Moose," Castro said.

Optus has also been wholesaling its 4G network [2] to Virgin Mobile [3] and Amaysim and its MVNO brands Vaya[4], Live Connected, and Zen Connect for around two years.

Optus in February reported "record" growth of its own mobile customer base[5], with 127,000 post-paid customers added during the three months to December.

During the same time, it lost 29,000

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