Bango, a U.K.-based direct carrier biller, announced Monday it has acquired the BilltoMobile carrier billing service and associated contracts from Danal Inc., according to a press release.

As a result of the acquisition, Bango is the only processor of carrier billing transactions across all four major U.S. mobile network operators, representing more than 300 million connected devices and handling $80 million of transactions in 2015.

Bango said the acquisition enables MNOs and other Bango partners—including Google, Microsoft and others—to use Bango technology for carrier billing in the U.S, achieving greater scale and higher revenues from carrier-billed payments in this high-value market.

"We have worked with BilltoMobile for many years and there are tremendous synergies already in place," said Bango CEO Ray Anderson. "The unmatched combination of Bango's powerful technology, coupled with the depth of BilltoMobile's high-quality software and trusted operator relationships, will now create a premier customer experience for Bango and its app store partners in the U.S. market."

The Bango Payment Platform enables stores to optimize customer's carrier billing experience and increase sales for content developers, according to the company. The platform is shared across the industry by the leading app stores, enabling them to offer carrier billing cost-effectively and at scale. Each operator and app store only integrates once, simplifying monitoring and maintenance.