International mobile roaming specialist CallBlue GSM launched services on 10 July using it own proprietary, dedicated network. Owning the technical infrastructure allows CallBlue to have complete control over call costs, quality, security and billing. A CallBlue GSM SIM card gives users instant access to low international call costs in more than 115 countries worldwide. The call forwarding feature allows users to answer their normal mobile number on CallBlue GSM when roaming and not pay any roaming charges. Each customer gets a personal CallBlue e-mail account, with voice messages left on their CallBlue SIM card automatically forwarded to their in-box. The service also offers a conferencing call facility for up to 18 people to take part in a conversation at once. CallBlue is using the Billing 1000 billing system from PortaOne and core network system from Tecore.

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