I had tried Robokiller for the free trial and did not re-suscribe. It was however still installed on my phone. Even though Robokiller is supported in Canada and by my provider, I was charged 14 months of call forwarding long distance charge overarges to the USA. It took me months and a complaint to Canada's CRTC before I found out Robokiller was the culprit. Do not install this if you are in Canada using Rogers or Fido! I'd give ir less than 1 star if I could.