Configurations of GSM/VoIP networks allow the service providers to avoid the local Wired Public Switched Network (PSTN) in communication with a GMS mobile handset. As a result, the high rates charged by telephone companies are avoided.
VoIP Shop was established in 2000. VoIP Shop is a leading provider of high quality VoIP services to customers around the world. We are dedicated to creating and maintaining win-win relationship with our partners and clients. VoIP Shop works with more than
Read more