Challenger Mobile, the innovative Application Service Provider (ASP), enabling companies to offer truly global mobile telephony by challenging roaming and increasing margins on international calls. Challenger Mobile enables operators, service providers and retailers to offer mobile Voice over Internet Protocol (mVoIP) to an already established customer base. The service is a complete, end-to-end, fully hosted and white labeled solution, giving partners the freedom to brand all aspects of the service towards end-customers. With Challenger Mobile there is no need for heavy investments in expensive hardware or infrastructure and all technical aspects of the solution are handeled by Challenger Mobile.