I am currently on Koodoo Prepaid, but keep receiving offers to switch to Postpaid. Which is better ? Current prepaid is $50.00 a month because the cheaper prepaid rates kept giving me messages that I was out of minutes, which I couldn't understand because I don't 'talk' on the phone that much. I honestly do not understand what the differences are between Prepaid and Postpaid. And Tabs are a complete mystery to me. Can anyone help ? Thanks so much.