I was with Telstra. Spoke can do exactly the same thing on my mobile - saving about $800 a month! I moved my business numbers to Spoke, so now I can run my business from my mobile anywhere in the world. I purchased a New Zealand and UK number, and can answered these on my mobile too. Their Tech Support is brilliant, I was setup an running in about 10 minutes. I can't recommend these guys highly enough - Absolutely brilliant!