We have an alternative to ensure people do not waste a dime on airtime other than the basic plan fees. It works with customers that have unlimited incoming calls, a plan that costs $25 a month. Adding our 'Mobile Plus' service, which is $10 per month or $100 per year ($20/mth for unlimited in CAN & US), the customer can make unlimited outbound calls without incuring fees on the Rogers/Fido network.
How it works: http://www.horizontelecom.ca/mobplus/index.html
Even our Home Phone service is under $200 per year.