Challenger mobile™ is a service offered by Mobile Business Challenger MBC AB.

We are a Swedish company that has developed the next generation platform for mobile internet telephony. This platform is what powers this site, challengermobile.com, and the services we offer in beta here.

But we also offer our platform to other wireless operators and the content providers and services companies that serve them. These companies can license our platform and thereby also offer mobile VoIP to their subscribers, entirely under their own brand.

Why do we do this? Because we believe that cost-efficient internet calls should be mobile, easy to use and flexible enough for anyone to use – and the more people that has a SIP number, the more people you (the subscribers) can call for free.