O2's announcement does not mean you can't use your bundle in EU countries. It states that customers on tariffs higher than 25GB will have to pay a surcharge to access more data - currently £3.50 per GB. Customers on tariffs below that will be able to use all their data as normal and will have to buy data bolt-ons if they wish to access more. Can't wait until then? To buy more data now, sign in to My O2. Or call 2202 from an O2 mobile, or 0344 809 0202 from any other phone. And you can still use wifi. O2 Wifi is free to use and we have 1000s of hotspots around the country. To help stop this from happening again, you can keep track of your data usage and allowances using My O2. O2 also has an O2 Travel Inclusive Zone for selected 'Plus Plan' customers, which allows you to roam at no extra cost in 75 destinations worldwide, including USA, Mexico, Canada, New Zealand, Argentina and Australia. Yes, you can buy extra data on O2. This is very easy to do, either through the My O2 app or through your My O2 account. Once you have logged in to your My O2 account, you can select "Add Bolt Ons" to purchase extra data. You can choose from a variety of different data plans, depending on your needs. 3:01. More than a hundred container ships are taking the long route around Africa to avoid violence in the Red Sea, creating extra costs and delays, as the US weighs up how to respond to the Yes! You can purchase extra data on O2 to keep your phone connected. You can choose from a range of data bundles, depending on your needs. The data bundles range from 1GB to 50GB, so you can pick the best one for you. You can purchase the bundles online or through the O2 app. When you're running low on minutes, texts or data, you can top up with a Bolt On, from as little as £3 a month. There are even Bolt Ons for calling abroad, or if you're going away yourself. If you're already with O2, you can manage your Bolt Ons in My O2. Otherwise you can add them once you've joined us. Buying extra data. Hi. I've just changed my o2 tariff and it takes effect in about 3 weeks but I've run out of data and need to buy more. On my account page when I click 'buy bolt ons' it just shows me a message with a exclamation mark telling me that my tariff is changing in 3 weeks. You can find this deal at Mobile Phones Direct to get unlimited data, calls and texts on O2. With a handset price of £1,099 if looking for a SIM-free option, this deal is not one to miss. O2 PAYG customers can bag themselves a seasonal data boost for no extra cost. New and existing O2 customers can enjoy more data for the same price, for up to three months on their contract-free Rolling Plans and Big Bundles. To qualify for the offer, payment must be made three months in a row. qk49iM.