I agree that the best way to check is to log into your Self Serve account to see how much data you've actually use (and what's remaining).
One other thing to note, is that Public Mobile is on a 30-day plan cycle. Most other providers (and phones!) track data by Month so after a few months the days can start moving around and gets confusing. There are third-party apps you can use to track your data by 30-days or you can update this whenever your Plan goes to a new cycle. Hope this helps a bit! 🙂
Log in into your PM account and check your data usage there. That is the Most accurate tracking. All other usage values (through your phone or 3rd part apps) will not be 100% correct same as SMS from PM.
