Best SIM Card for Europe & International Roaming
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Looking for a UK SIM-only plan with a few decent travel perks?
You know… the important stuff. Like free data roaming when you’re abroad and bacon rolls.
Even better, if you’re on an O2 Plus plan or a Volt package with Virgin Media, roaming can also include destinations like Mexico, the Caribbean, the USA and Canada.
For frequent travellers, these perks add up.
No faffing with eSIMs — just land, switch your phone on, and get on with your trip.
Quick Answer:
If you want free data roaming when travelling abroad, O2 SIM-only plans are one of the best options for UK travellers. Many plans include EU roaming, and O2 Plus or Volt packages can also cover destinations like Mexico, the USA, Canada and the Caribbean without extra daily charges.
It means you can land, turn your phone on, and use your data as normal without buying a local SIM or messing around with eSIMs.
👉 Check the latest O2 SIM-only deals here
O2 Top 5 Travel Perks
Here’s why we rate O2 for travel:
- Free roaming across Europe on all plans
- Calls and texts included in many packages
- O2 Priority perks (including the famous free Greggs bacon rolls)
- Free airport lounge access if your flight is delayed
- Double data if you’re a Virgin Media customer
For frequent travellers, that combination is pretty hard to beat.
You’re not just getting a SIM plan — you’re getting a few handy extras that actually make travelling easier.
And let’s be honest…
A free airport lounge when your flight’s delayed already puts O2 ahead of most networks.
Free International Roaming
This is where O2 really earns its keep.
Since Brexit, free roaming in Europe has slowly disappeared from many UK networks.
O2 didn’t follow the trend.
They still include free data roaming across Europe, plus calls and texts depending on your plan.
Even better, your data can also be used in 75 countries outside of Europe, including:
- The Caribbean
- Thailand
- Mexico
- Australia
- USA & Canada
Realistically, you probably won’t be streaming Netflix in the Amazon rainforest…
…but it’s reassuring knowing your phone will still work without ridiculous roaming fees.
Check O2 Travel Inclusive Zones
What Is The Fair Usage Policy on O2?
Naturally there are a few limits, but they’re actually pretty reasonable.
Unless you’re live-streaming 24/7 or living abroad for months, most people will never hit them.
Here’s the basic rundown:
- 25GB data roaming allowance per month
- Maximum 63 days usage within a four-month period
For typical holidays or city breaks, that’s more than enough.
So go ahead.
Upload those coffee photos. Post the sunset. Message your mates.
Your bill won’t explode.
O2 Priority Perks
O2 Priority isn’t just about bacon rolls.
There are loads of rotating perks, including:
- Free drinks and food discounts
- Early access to concert tickets
- Competitions and giveaways
- £1 weekly PureGym day passes
- 2-for-1 drinks offers
Some of the deals are limited, so you need to be quick.
But once you start using Priority, you realise how often it comes in handy.
Out with friends?
Boom. 2-for-1 drinks.Priority. Out with friends? Grab two for one drink.
The offers and discounts change frequently, so they stay fresh.
How O2 Compares to Other Networks
When it comes to travel convenience, most UK networks simply can’t compete.
Many providers now charge around £6 a day just to use your data in Europe.
That adds up fast.
O2, on the other hand, still includes roaming in many plans.
As they say themselves:
“We’re proud to be the only major network that isn’t reinstating EU roaming charges.”
Hard to argue with that.
Check O2 Sim Only Deals
Things to Beware Of
There are a few requirements.
To take advantage of these plans:
- You must be a UK resident (or have a UK address)
- Most plans require a 12- or 24-month contract
If contracts aren’t your thing, we get it.
But in reality, SIM-only contracts often work out cheaper than PAYG, especially if you want roaming included.
Ex-Vault Customer? Don’t Accept the Auto-Renew Price
When my Virgin Media contract ended, I lost the bundled free O2 SIM that came with the Volt package.
Painful.
So Russ went into negotiation mode.
I didn’t need unlimited data, and I definitely wasn’t interested in paying silly money.
After a bit of back-and-forth, Russ managed to negotiate a solid 12-month deal instead of committing to a 24-month contract.
Final Thoughts
If you can land a deal under £15 per month, O2 is hard to beat.
You get:
- Free roaming across Europe
- Global travel coverage
- Solid UK coverage
- O2 Priority perks (including those legendary Greggs rolls)
For travellers, it’s a simple, stress-free option that just works.
Exactly what you want when you’re heading off on holiday.
👉 Check the latest O2 SIM-only deals here
More Travel Tips & Guides
- Spending Abroad Without The Fees
- TUI Flex: What Is It and Is It Worth It?
- Mexico Tourist Taxes: Everything You Need to Know
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