Mocha Messenger, an over-the-top (OTT) service that provides free Internet-based calls and messaging for users, reached some 10 million of users by the end of October, two years after its launch.
Viettel Telecom, a member company of the Viettel Group, on April 20
launched its own over-the-top (OTT) service that provides free
Internet-based calls and messaging to users.
