This paper presents an architecture called social distributed hash table (SDHT) that combines strengths of distributed hash table (DHT) algorithms and social networks making mobile search fast and context oriented. The paper presents possible implementations of the proposed architecture in the IP multimedia subsystem (IMS) and as a standalone SIP based system. The architecture forms a cost efficient platform for providing innovative mobile services that take advantage of social context of human communication. The architecture can be used to deploy a global virtual mobile network by placing SDHT nodes in different geographical regions. The paper also presents a content sharing inside community service.