That depends on the way the data was acquired and the account was set up.
In my case, I had the data plan 3 Gb $15 first. At that time I had Chatr $20 unlimited local call. After a few months I got text from Chatr to migrate to Fido with free text too. I said nice and I moved. I have one account with completely separate voice plan
Fido $0 3Gb LTE + overage plan until Feb 2019