We have added a 10 day VPN Service Free Trial option. Login to your Diamondcard account, then click "vpn service" in the Telephony section of the nav bar.
More information can be found at VPN Service.
Our VPN Service allows you to send and receive VOIP calls securely from your location anywhere in the world direct to our USA and European servers without censuring, blocking, or de-prioritizing the traffic.
The only way to go for users in countries that block VOIP services.