I am going to Europe for 6 weeks and will not be using my phone at all. If I put my plan on a 'seasonal hold', will I be able to continue on with my same plan when I get back? Or will I have to start my contract over again?
As long as the plan you have now is still available in 6wks you will be able to Return to it however. According to Mobile Syrups rumour mill, Koodo is planning a shake up plan wise so you are probably better off to just pay your plan instead of the seasonal hold.
Oh and you don't ever have to restart your contract. You would just be forced to take a plan that is offered when you get back. You're free to change your plan every month if you wanted to. And you're free to cancel anytime by just paying off your tab. Koodo doesn't have traditional contracts.