Tech stuff

Challenger mobile embraces the international standards that make communication between devices better and more widely supported, therefore we support the SIP protocol.

As a service provider that uses SIP, the number of devices that work with our services grows rapidly with the growth in SIP supported mobile handsets and smartphones. SIP also ensures that calls can be made between different service providers and their networks, not only within our own network of users. After all, that is the whole point of open standards and protocols within telecommunications.

We work hard to ensure that quality of service and reliability are at optimum for our users. Therefore we only use the most stable systems in our backend.

We are happy to hear your experiences from using our services in different environments. Everything from firewall traversal to public hotspot access are interesting and we welcome your feedback and thoughts to us at support@challengermobile.com.