The Fido prepaid long distance charge within Canada or to the US is C$.30/minute. Best to use a calling card or callback service to get around this if you intend to make many calls.
See the prepaid part of the Fido website at
http://www.fido.ca/portal/en/packages/prepaid.shtml for lots of information on their service.
Phones/Wireless Devices: Doogee S90, Isatphone Pro, Amazon Kindle 3G, SkyRoam MiFi device, Karma MiFi device, AT&T Liberate MiFi device
Sim Cards: T-Mobile (Mint), AT&T (Mifi device or Kindle), Koko
Satphone: InMarSat
Broadband US Wireless Data: AT&T postpaid, Sprint (Karma Mobility prepaid)
Broadband International Data: SkyRoam
VOIP: Skype