Quick answer
Roaming in Slovenia on a UK phone is no longer guaranteed to be surcharge-free since Brexit, so whether you pay extra depends on your operator. gov.uk notes that UK law keeps a default £45 monthly limit on mobile data spending abroad, with alerts at 80% and 100%. The Tourist Board says there's coverage throughout the country and local SIMs from €10.
Quick facts
- UK roaming in the EU
- Not guaranteed; check your operator
- Data spending limit
- £45 a month by default
- Usage alerts
- At 80% and 100%
- Coverage
- Throughout the country
- Local SIM
- From €10
- Country code
- +386
The essentials in a few lines
Full read: 2 min
- Free EU roaming isn't guaranteed for UK phones since Brexit.
- UK law keeps a default £45 monthly data spending limit abroad.
- Coverage throughout Slovenia.
- Local prepaid SIM from €10 if your deal is poor.
Before leaving, I'd look up exactly what my operator charges in the EU, because it varies from one contract to another. If it's expensive, a Slovenian prepaid SIM from €10 is the simplest fix for a week or two.
Before you go
What the official sites leave out
-
01 My tip
Check your operator
gov.uk says surcharge-free roaming in EU countries is no longer guaranteed since the UK left the EU, and that you should check your operator's roaming policy before travelling.
-
02 Money
The £45 data limit
UK law keeps a financial limit of £45 per monthly billing period on mobile data abroad, so you can't keep spending unless you actively choose to.
-
03 To save money
Slovenian SIM from €10
The Tourist Board suggests that if your operator charges a lot for calls, you buy a Slovenian SIM card or a prepaid phone, available from €10.
Slovenia on a budget -
04 Most beautiful
Coverage everywhere
According to the Tourist Board, you can use a mobile phone anywhere in Slovenia. On long mountain routes, I'd still download maps in advance.
what to pack for Slovenia
How to do it, in order
-
Check your contract
Look up what your UK operator charges for calls, texts and data in the EU before you travel.
-
Mind the data cap
UK law keeps a default £45 monthly limit on data spending abroad, with alerts at 80% and 100%.
£45 a month
-
Buy a local SIM if needed
If roaming is expensive, a Slovenian prepaid SIM from €10 covers a week or two.
From €10
Roaming options from the UK
| Option | What it means | Source |
|---|---|---|
| Your UK contract | Depends on the operator's EU roaming policy | gov.uk |
| Data spending abroad | Capped at £45 a month unless you opt to continue | gov.uk |
| Usage alerts | At 80% and 100% of the limit | gov.uk |
| Slovenian prepaid SIM | From €10 | Slovenian Tourist Board |
| EU-registered SIM | Roam like at home in the rest of the EU | Your Europe (European Commission) |
gov.uk, «Using your mobile in EU and EEA countries»; Slovenian Tourist Board, «Mobile Phones, Mains Voltage, Radio Channels»; Your Europe, roaming page. Checked on 17 October 2026.
Roaming in Slovenia after Brexit
According to gov.uk’s guidance on using your mobile in EU and EEA countries, roaming without surcharges stopped being guaranteed for UK customers when Britain left, business travellers included. Several operators said at the time that they didn’t intend to change their policies, yet the government adds that this could change, so the only reliable check is your own operator’s terms before you go. Contracts differ widely, so read the roaming section of your plan rather than assuming it’s like your last trip.
The protections that remain
Two safeguards survive in UK law. One is a ceiling of £45 a month on what you can spend on data while abroad, so data stops unless you actively agree to spend more. The other is a pair of warnings, one when you’ve used 80% of that allowance and another when you hit the full amount. The cap prevents a nasty surprise, but £45 can still disappear fast if your operator charges by the megabyte. Customers in Northern Ireland also keep protection against roaming by accident near the border, gov.uk says, though that matters little in Slovenia. If you’ll be crossing into Croatia, Austria, Italy or Hungary on the same trip, check that your operator’s EU roaming terms cover each of them before you set off.
Coverage and local SIM cards
The Slovenian Tourist Board says you can use a mobile phone anywhere in the country, on the standard European frequencies. It names Mobitel and Simobil as the two largest operators and suggests that if your home operator charges a high price for calls, you buy a Slovenian SIM card or a prepaid phone, available from €10. For a week or two of maps, messages and the odd call, that’s often the simplest answer. More money-saving ideas for the whole trip are in Slovenia on a budget. If you’re planning long routes in the Julian Alps, download your maps before setting off, as I explain in what to pack for Slovenia.
To sleep close to everything, search places to stay in Ljubljana on Expedia and filter by area before price.
Country code and emergency numbers
Slovenia’s country code is +386. For emergencies, dial 112, which also covers mountain rescue, and 113 for the police. On the road, the Tourist Board notes that Radio Si, the international station of the public broadcaster, gives traffic information in English and German every hour after the news, and four times an hour in July and August. More safety advice is in is Slovenia safe, and for charging your phone, see plugs in Slovenia.
If you are short on time, see the best tours in Ljubljana and pick one that fits your day.
To sleep close to everything, search places to stay in Ljubljana on Booking.com and filter by area before price.
Lake Bohinj from the top of Vogel, stretched out between wooded slopes and rock walls, with the Julian Alps peaks behind
Tartini Square in Piran from above, with the statue in the middle, the harbour and the sea beyond
Test yourself
True or false?
0/3 Pick before you peek.
-
Since Brexit, free roaming in Slovenia is guaranteed for all UK phones.
See the answer
False. gov.uk says it's no longer guaranteed and depends on your operator's policy.
-
UK law sets a default £45 monthly limit on mobile data spending abroad.
See the answer
True. gov.uk says the limit was kept in UK law, with alerts at 80% and 100%.
-
A Slovenian SIM card costs at least €50.
See the answer
False. The Tourist Board says you can buy one from €10.
- Default monthly data limit abroad
- £45
- First usage alert
- 80%
- Local SIM, from
- €10
- Slovenia's country code
- +386
0 of 425 Slovenia guides
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- Best time to visit
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Slovenia roaming: questions and answers
Is roaming free in Slovenia with a UK phone?
Not necessarily. gov.uk says surcharge-free roaming in the EU is no longer guaranteed since Brexit; some operators have kept it, but you should check your own operator's policy.
Is there a cap on roaming charges for UK phones?
gov.uk says UK law keeps a default financial limit of £45 per monthly billing period on mobile data while abroad, with alerts at 80% and 100% of usage.
Should I buy a Slovenian SIM card?
If your operator charges for EU roaming, it can make sense. The Tourist Board says a SIM card or prepaid phone costs from €10.
Is there mobile coverage in the mountains?
The Tourist Board says phones work throughout Slovenia. On long mountain routes, download maps beforehand and remember 112 for emergencies.
What's the country code for Slovenia?
+386. To call a UK number from Slovenia, dial +44 and drop the first 0.
Questions about Slovenia? Write to me
If you need something else to finish planning, write to me. I answer myself, no templates.
My email sergiolepone@gmail.com
By
Tourism graduate with a master’s in Tourism Management and Planning from the University of Málaga, who has travelled across Europe. He writes every guide from official sources and his own judgement.
Published on . Updated on . Facts checked on .
Sources
Some links in this guide are affiliate links: if you book through them, the site earns a commission at no extra cost to you. Affiliate disclosure
Photos: Tournasol7 (CC BY 4.0); Luka Peternel (CC BY-SA 4.0); Isiwal (CC BY-SA 4.0), via Wikimedia Commons.