Best answer by Dinh
Have you tried to use your old SIM into the new phone? the new sim wasn't activated and you could keep the old SIM if it fits the new phone. If you want to use the new SIM, you need to switch SIM in your self service https://www.koodomobile.com/help/koodo-sim-support
Regarding the wifi, what phone was it? I would suggest you update the new phone to the latest firmware, and try it again.