Going to the World Cup makes for an expensive holiday. First of all there's the flights to Brazil, and the ticket itself - not cheap even if you're watching one of the less exciting fixtures this summer.
But even ignoring food, accommodation and drink, there's still the question of mobile tariffs. These days, all mobile operators have a cut-off limit once you've spent the equivalent of €50 (£40) wherever in the world you travel.
But while they send notifications to warn you when you reach 80%, then 100% of that limit, that's still an awful lot of money to burn through.
Besides, data is addictive and plenty have been hit with crazy bills because they decided to use it for a bit longer.
Here's five ways to avoid having your World Cup holiday spoiled by a hefty bill.
Check with your operator how much it will cost to use your phone in Brazil. Often they can offer you a data roaming package that will cut your costs (though be sure to check how much it will cost if you go over the limit).
It's always better to be safe rather than sorry. Apps can download updates without your knowledge and you'd be surprised at the number of applications you leave open on your tablet that are secretly guzzling data.
You won't be informed that you're approaching your data limit until you hit 80% of your allowance, so you can easily burn through £40 you haven't budgeted for if you get carried away.