Best answer by Chad Burr
Sure, you can go online and apply for postpaid service, you'll need a new sim as the prepaid sims are only good for prepaid.
Koodo will run a credit check and send you a new sim card. Just pop the new sim into your phone and off you go.
Oh and because you already have a phone, you can ask koodo for an additional 10% off your bill each month.
If you're keeping your number you can set everything up right online. Just keep your prepaid service active so you can port the number over to the new sim.
If you have any boosters, you may want to use them up before you port over as they have no cash value and can't be transferred to postpaid.