If I'm on a data only plan, can I buy an addon for voice+text when I need to?
Yes you can, you can also add money in the Fizz wallet to pay as you go
The addon has a limited validity in term of days
Add-Ons are active immediately. They’re valid until the end of your next payment cycle.
In other words, if there are 10 days left on your current payment cycle, your Add-On will be valid for approximately 40 days.