Wish I could give a better answer than this: I think Rogers is the only phone that allows a shared or roaming based plan. Not sure though. If the phones are unlocked I ASSUME that it will work on our towers.
Best to phone and find out though.
For 6 months, depending on the type of plans you are looking for, our carriers are as follows:
The BIG Three (own all of the towers and the smaller companies)
Telus: They own Koodo.
Bell: They own Virgin Mobile
Rogers: Owns Fido (I think)
Lesser used or known for smaller plans (students/ light users)
Wind Mobile
Moblicity
I am sure I am missing some, but to get the answers you seek, phoning Telus, Rogers or Bell would be your best bet. Just as an FYI Telus and Bell share the same LTE towers/towers.