How to use your phone abroad from the UK: Your options explained

The cost of a holiday adds up fast once you’ve paid for flights, hotels, meals, and everything else — so the last thing you want is a surprise mobile bill waiting at home. Since Brexit, the old EU roaming rules no longer cover UK travellers, and what you’ll pay to use your phone abroad now depends on your provider, your plan, and where you’re headed. The good news? You’ve got options. There are four main ways to stay connected while travelling: roaming with your current provider, buying a local SIM, relying on Wi-Fi, or using an eSIM. Each has its own trade-offs around cost, convenience, and data — and the right one depends on how you travel.

Why roaming charges catch travellers out

It’s easy to assume your phone will work abroad just like it does at home. Sometimes it does — but since Brexit, EU and EEA countries are no longer guaranteed to play by the old roaming rules. UK providers now set their own charges and pick which countries are included in their packages. Daily roaming fees are common, and while a couple of pounds a day might not sound like much for a weekend away, it adds up fast over a week or more.

There are some protections in place. Providers have to tell you about roaming charges upfront, and you can set a spending cap so a runaway bill never ruins your holiday. Still, it pays to do your homework before you fly: check your provider’s terms and what you’d actually pay at your destination.

Option 1: Stick with your provider’s roaming

The simplest option is doing nothing at all. Many UK providers include roaming in certain plans — especially for EU destinations — or sell roaming add-ons you can bolt onto your package before you travel.

Advantages:

• Zero setup — your phone just works, same as at home
• You keep your UK number for calls and texts
• Some plans include EU roaming at no extra cost

Disadvantages:

• Daily fees (often £2 or more) quickly add up on longer trips
• Outside Europe, out-of-bundle rates can get seriously expensive
• Your roaming data allowance may be smaller than what you get at home
• Coverage varies by destination, so you’ll need to check your specific package

Roaming makes the most sense for short trips where your destination is already included, or if you mainly need calls and texts rather than data.

Option 2: Buy a local physical SIM

Picking up a SIM card in the country you’re visiting is the traditional way to avoid roaming charges — and it’s often the cheapest way to get data, full stop.

Advantages:

• Local rates are usually the best value, especially for longer stays
• Data packages are generous in many countries
• You get a local number, which can be useful for restaurant bookings and other local services

Disadvantages:

• You have to find a shop and activate the SIM after you land
• Language barriers can make that trickier in some countries
• While the local SIM is in your phone, your UK number is harder to reach
• Your phone needs to be unlocked, or it won’t accept another carrier’s SIM

A local SIM works best for longer trips — think two or three weeks or more  — where the savings make the extra legwork worth it.

Option 3: Rely on Wi-Fi

Free Wi-Fi is widely available these days — at airports, hotels, cafés, and restaurants.  And for some travellers, that’s genuinely enough.

Advantages:

• Completely free
• Nothing to set up, and it works on any phone
• Fine for messaging, checking email, and browsing when you’re connected to a network

Disadvantages:

• Limited once you step outside — no maps, searches, or ride bookings when you’re out and about
• Public networks aren’t secure, so skip banking and sensitive logins unless you’ve got a VPN
• Speed and reliability can be unpredictable
• People can’t reliably reach you for calls

Wi-Fi on its own suits travellers who don’t mind being offline between stops — or it works well as a backup alongside another option.

Option 4: Use an eSIM

An eSIM is a digital SIM you install on your phone alongside your existing one. Your UK SIM stays put — you just add a prepaid data plan for your trip. Providers such as Saily offer international eSIM plans for travellers who want to arrange their mobile data before they leave.

Advantages:

• Setup takes minutes: buy your plan online, scan a QR code, and you’re ready to go
• Your UK SIM stays active, so calls and texts to your normal number still come through
• Prepaid means you know exactly what you’re spending
• No hunting for a SIM shop after you land

Disadvantages:

• Not every phone supports eSIM — check your settings first (recent iPhone, Samsung Galaxy, and Google Pixel models generally do)
• Usually data-only, so no local number for calls
• Per gigabyte, it can cost more than a local SIM on longer trips
• Plans tend to cover one country or region, so a multi-stop trip might mean buying more than one

eSIMs suit travellers who want convenience and predictable costs on shorter trips — as long as their phone supports them.

How to choose the right option for your trip

There’s no universal right answer — it depends on your trip. A few questions will narrow it down:

• How long are you away for? A weekend trip might justify paying roaming fees; a month abroad makes local rates a lot more attractive.
• Where are you headed? Check whether your provider’s roaming package covers your destination — and how local SIM prices compare.
• How much data do you actually use? Google Maps sips data compared to streaming Netflix, so light users have far more flexibility.
• Does your phone support eSIM? If not, you won’t be able to use this option.
• Do you need to be reachable on your UK number? Some options make this much easier than others.

Whichever route you go, a few habits will save you grief: check your provider’s roaming charges before you travel, confirm which destinations your package covers, work out roughly how much data you’ll need, and if you’re using another option, switch off data roaming on your UK SIM so you don’t rack up charges without realising.

Choosing what works for you

There’s no single cheapest or easiest way to use your phone abroad — it comes down to where you’re going, how long you're going, how much data you use, and what phone you have. Roaming buys you convenience at a price, a local SIM gets you the best rates in exchange for a bit of legwork, Wi-Fi is free but patchy, and eSIMs land somewhere in between. Weigh them up before you fly, and you’ll arrive with a setup that fits your trip — and a phone bill with no nasty surprises.