Hello.
Welcome to the Three Community.
You can use a Data Passport to get access to unlimited data for up to 24 hours. If you head over to the page there, you'll see some details about Data Passport.
The basics - It's £5 per day, gives you unlimited data, ends at midnight UK time each night, doesn't include minutes or texts so those would be chargeable to use (check the link MZone shared for details on that).
Pete.
