Truphone has greatly increased the numbers of countries it includes in its roaming offering as it looks to ramp up its base of business customers.
The enterprise-focused mobile operator has added 58 new countries to the eight "core" zones where it offers its service – a SIM card to which customers can add up to eight international numbers and roam by paying local rates.
Countries including France, Italy, China, Japan and Brazil have been added to the US, the UK, Australia, Hong Kong, the Netherlands, Germany, Poland and Spain. The new service is called Truphone World.
The company has also announced a range of new bundles, including what it claims is the world's first half a terabyte international plan.
Truphone said the move came as traffic on its network and its customer base grows exponentially.
The operator does not reveal exact customer numbers but said they include Harley Davidson and five of the "big eight" world banks.
Chief Commercial Officer Manju Kesani told European Communications that the company had doubled its customer base in Q4 last year and again in the first three months of 2014.
He said Truphone is "on track" to double its customer base again by end of the second quarter.
The voice and data traffic of customers tends to double after joining, the CCO added.
However, the new announcements do not include the option to add more than eight numbers to its SIM.
Lawmakers in Europe and currently pushing through legislation that aims to remove roaming charges across the continent by the end of 2015.
Amid such regulation, Kesani admitted that Truphone's eight country focus had been a drawback.
Truphone CEO Steve Robertson [pictured] commented: "Last year data usage increased five-fold in some places; and the internet has opened up a new dimension to global trade. The urgent need of businesses is there right now, Truphone World will enable businesses to use their mobile devices around the major business centres of the world in the Americas, Europe, Asia and Oceania."
The company does not disclose financial information. However, it does claim that its Net Promoter Score, a measure of customer advocacy, is at 70 percent, the highest in the mobile industry.
Watch an interview with Truphone Customer Services Director Rodney Sheriff from European Communications' customer experience seminar earlier this year