Telecube have taken on our existing 1800 number, which they have set up with backup voicemail. The service has been fantastic, well and above what I have experienced with previous providers, and at a fraction of the cost. Their many years of experience in the industry is obvious, as is their belief in great customer service and customer satisfaction. I find the pre paid option very refreshing, and the reports they offer on usage are quite detailed. I couldn't recommend Telecube highly enough to anyone looking at porting an existing number, or setting up for the first time.