You will be asked to log into the app with the email address used for the purchase, and you will then receive a registration code to enter the app. After completing the registration process, your tickets should display in the app.
On the day of the match, you will have to:
have your phone charged
have your Bluetooth on
make sure that the date and time are set to local time (i.e.: the time zone where the match is taking place)
show your phone with the application opened to enter the stadium
Check out the 1-minute video below to see how to use the mobile tickets.