Best answer by Dinh
I assumed you ordered a new phone on the same account? you could re-use the SIM card in the old phone if the SIM fits. You can keep the new SIM (inactivated SIM) for future use.
If the old SIM doesn't fit into the new phone. you could follow the step here to change your SIM card. https://www.koodomobile.com/help/koodo-sim-support