Just go to the site dfbutt mentioned above and check out all the things.
In that website go to https://activateprepaid.koodomobile.com/ and then you will be directed to a site where you will have to create a prepaid self serve account. The steps are very straight forward so it will be fine. After all the steps have been finished, insert your SIM card into your phone and then at first a TELUS sign will come up but after a few seconds, a Koodo sign will come up. Now you can enjoy the Koodo happiness:)
Hope this helps:)