If you've created event tickets using Ticket Generator web application, then the tickets can only be validated using the Ticket Validator mobile app (available on Google Play and App Store).
If you scan the QR Code on a ticket using a generic QR Code scanning feature on your smartphone, you will only get the ticket code. The ticket cannot be validated this way.
The use of Ticket Validator mobile app ensures that only authorized event coordinators can validate tickets as they will be required to login to the mobile app before validation.
If you still have questions related to this topic, please feel free to reach out to the customer relations team at firstname.lastname@example.org.