Speakout and Petro Canada phones and SIM cards are interchangeable.
You do not need to top up the SIM card when you activate it, You won't be able to do much but call customer service and receive text messages though. You have 30 days to top up, or the SIM will expire.
Once you activate the SIM, you can either top it up online, or buy airtime at 7-eleven.
This site is run by a 7-Eleven Speak Out Wireless customer. I am not a 7-Eleven employee, nor do I receive any compensation from them for providing this site. The goal is simply to share consumer information with others.