
Montenegro SIM Card vs eSIM: EU Roaming, Cruise Stops & Coverage (2026)
Montenegro isn't in EU Roam Like at Home. Compare tourist SIMs and eSIMs for Kotor, Budva and Durmitor, including cruise day stops. Plans from $2.
ReadAuthor
Angelus Sharma
Published
August 1, 2026

A weekend in Paris. Two weeks in Spain. An Italian road trip. Island hopping in Greece.
For UK travellers, visiting Europe is straightforward.
Understanding what happens to your mobile phone bill after you arrive?
Not quite as simple.
Years after Brexit, there's still considerable confusion around one basic question:
Is data roaming free in Europe for UK travellers?
The short answer is:
Not automatically.
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Some UK mobile plans still include European roaming. Others charge daily fees. Some impose fair-use limits, while countries you might naturally think of as part of a European roaming package—such as Turkey or Switzerland—can fall into completely different charging zones.
That means the old assumption that "Europe = use my phone normally" can become expensive.
According to the supplied 2026 information, daily European roaming charges among some UK networks are moving around the £2.00–£2.75 per-day range, while roaming in destinations outside standard European zones can cost considerably more.
The safest approach is to check your exact mobile plan before travelling.
Alternatively, travellers increasingly arrange a travel eSIM before departure. With eSIMLLY, UK travellers can prepare their mobile data before leaving home and choose travel connectivity for destinations across more than 160 countries and regions worldwide.
First, however, let's understand why European roaming became complicated in the first place.
To understand today's roaming rules, we need to go back to the pre-Brexit system.
For several years, UK travellers benefited from the European Union's Roam Like at Home framework.
It made European travel wonderfully boring from a mobile-billing perspective.
You could arrive in Barcelona, Paris or Rome and generally use your domestic mobile allowance without paying traditional roaming surcharges.
Then Brexit changed the legal position.
Roam Like at Home is an EU roaming framework introduced in 2017.
It allows eligible consumers from participating EU and European Economic Area countries to use mobile services while travelling within the covered area without traditional additional roaming charges, subject to applicable fair-use rules.
For UK consumers, this system was particularly convenient before Brexit.
Your UK mobile plan could essentially travel with you across participating European destinations.
After the UK left the European Union, UK operators were no longer legally required under EU law to provide the same arrangement.
That didn't mean every UK network immediately introduced charges.
It meant they gained the ability to set their own policies.
And that is largely why the situation today varies so much.
There is no universal answer.
Whether you'll pay extra depends on:
Your mobile network
Your specific tariff
When you joined or renewed
Your destination
Your data usage
Your network's roaming zone
Fair-use restrictions
Some contracts may include European roaming.
Others require a daily payment.
Some offer roaming passes or bolt-ons.
And some destinations fall outside normal European packages entirely.
So before travelling, don't merely ask:
"Does my network have European roaming?"
Ask:
"Does my exact plan include roaming in the exact country I'm visiting?"
That extra sentence could save you quite a bit of money.
According to the supplied source material, many paid European roaming arrangements now sit at roughly:
£2.00–£2.75 per day
depending on the network and plan.
A daily fee might not sound particularly dramatic.
Until you multiply it.
For example:
3-day trip: roughly £6–£8.25
7-day trip: roughly £14–£19.25
14-day trip: roughly £28–£38.50
30-day trip: roughly £60–£82.50
Suddenly, the "small" daily charge has become another line in your holiday budget.
For destinations outside your provider's normal European roaming zone, charges can be higher still.
Although UK operators are no longer bound by EU Roam Like at Home requirements in the same way, consumer protections still exist in the UK.
The supplied material notes that Ofcom roaming protections introduced on 1 October 2024 require mobile providers to give customers clearer roaming information and alerts.
These measures are designed to help consumers understand:
When roaming charges apply
How much roaming may cost
When their device starts roaming
This is particularly useful in border areas where your phone may connect to a network in another country.
But an alert arriving after your phone connects is still less convenient than knowing your costs beforehand.
"Free roaming" doesn't necessarily mean unlimited use of your entire UK data allowance abroad.
Many networks apply a Fair Use Policy, commonly abbreviated to FUP.
This allows operators to limit how much data customers can consume while roaming under domestic-style pricing.
For example, you might have a very large or unlimited UK plan but only be permitted to use a smaller allowance while abroad.
Once you exceed that limit, your provider may:
Apply additional charges
Reduce your data speed
Restrict further usage
This is why checking the words "roaming included" isn't enough.
You also need to check how much roaming data is included.
A roaming fair-use limit is essentially the amount of data your provider allows you to use abroad under its normal roaming conditions before additional restrictions or charges may apply.
According to the supplied 2026 information, the EU wholesale data cap has fallen to approximately:
€1.10 per GB plus VAT
from:
€1.30 per GB plus VAT in 2025
The supplied source indicates that this is expected to decline further to around:
€1.00 per GB in 2027.
Wholesale pricing concerns what operators charge each other rather than necessarily what you'll see directly on your consumer bill.
But it helps explain why networks manage roaming usage and apply fair-use limits.
Have you ever had strong signal bars while your internet suddenly feels as though it has travelled back to 2007?
That may be data throttling.
Throttling occurs when a network deliberately reduces your connection speed after certain usage conditions are reached.
Depending on your roaming plan, fair-use terms may affect your available speeds after you've consumed a certain amount of data.
Your phone may still show 4G or 5G connectivity while actual performance becomes much slower.
That's why travellers using large amounts of data should examine not only the headline allowance but also any speed or fair-use conditions attached to it.
Whether the following destinations are included depends on your UK network and tariff.
However, European roaming zones commonly centre around the 27 EU member states.
These are:
Austria | Germany | Netherlands |
Belgium | Greece | Poland |
Bulgaria | Hungary | Portugal |
Croatia | Ireland | Romania |
Cyprus | Italy | Slovakia |
Czech Republic | Latvia | Slovenia |
Denmark | Lithuania | Spain |
Estonia | Luxembourg | Sweden |
Finland | Malta | France |
Again, don't interpret this table as a guarantee that your specific UK contract provides free roaming in every country.
It shows the EU destinations commonly associated with European roaming zones.
Your network's tariff remains the thing that matters.
These three countries are members of the European Economic Area (EEA) but not the European Union.
They are:
Iceland
Liechtenstein
Norway
Many UK networks include them within European roaming arrangements.
But not every tariff necessarily does.
This is particularly important for budget plans or packages with narrower roaming zones.
Check before travelling.
Geography and telecom billing have a complicated relationship.
A country can very obviously be in Europe while still sitting outside the roaming zone attached to your UK mobile plan.
Two particularly important examples are:
Turkey
and
Switzerland.
Both are major destinations for British travellers.
Neither is an EU member state.
Depending on your network, that can mean completely different roaming charges.
Don't assume it is.
Switzerland is not a member of the European Union.
Some UK mobile providers or particular tariffs may include Switzerland within their European roaming zones.
Others may not.
If your provider classifies Switzerland separately, your normal European roaming arrangement may not apply.
This becomes particularly important when travelling near borders with:
France
Italy
Germany
Austria
Your device may potentially connect to a Swiss network if automatic network selection is enabled.
Again:
Don't assume it is.
Turkey isn't an EU or EEA member state and is commonly treated differently from EU destinations by UK mobile networks.
That can result in:
Higher daily roaming charges
Separate roaming passes
Per-MB charges
Different data allowances
Turkey is exactly the sort of destination where checking your network's zone before boarding the plane matters.
It's also a good example of why travel eSIMs can make costs easier to understand.
Instead of wondering whether Turkey sits inside "Europe Zone A," "Europe Plus," "Zone B," or whatever delightfully cryptic name your network has invented, you can arrange a dedicated Turkey travel data plan before departure.
Several non-EU and non-EEA European destinations commonly fall outside standard UK roaming zones.
These can include:
Albania
Bosnia and Herzegovina
Kosovo
Montenegro
North Macedonia
Serbia
Policies differ by network.
Don't assume that travelling through the Balkans under a single UK roaming plan will automatically provide the same pricing in every country.
The supplied material notes that Ukraine and Moldova joined the EU's Roam Like at Home area from January 2026.
However, that does not automatically force UK mobile networks to provide surcharge-free roaming there.
UK travellers still need to check their own network's destination list and tariff.
The supplied material describes Russia and Belarus as destinations generally treated separately from standard European roaming arrangements.
Anyone travelling to either country should check current connectivity, network availability, payment restrictions and roaming conditions directly before travel.
Then there are Europe's microstates.
They're small enough to walk through parts of them surprisingly quickly.
Their roaming charges can be considerably less charming.
Andorra sits between France and Spain.
It is not an EU member.
Standard European roaming arrangements may therefore exclude it.
This can surprise travellers driving from Spain or France who assume their existing roaming setup will continue unchanged.
Monaco is surrounded by France but isn't itself an EU member state.
Some UK plans may include it.
Others may treat it separately.
Because Monaco is tiny and immediately adjacent to France, inadvertent roaming becomes particularly relevant.
San Marino is geographically surrounded by Italy but is an independent state.
Mobile coverage can overlap with Italian networks, but travellers shouldn't assume their provider classifies San Marino exactly as it classifies Italy.
Vatican City sits inside Rome but is politically independent.
In practice, visitors often remain connected through surrounding Italian infrastructure, but the classification used by your UK provider should still be checked if roaming terms are important to you.
Unlike the other examples above, Liechtenstein participates in the EEA framework.
Many European roaming plans include it.
Still, specific UK tariffs may vary.
Tiny country. Surprisingly large paragraph about mobile billing.
Some destinations connected politically with the UK or European states don't necessarily follow normal UK or EU roaming classifications.
Examples include:
The Channel Islands are Crown Dependencies rather than part of the United Kingdom for many regulatory purposes.
Check your roaming plan.
The Isle of Man also has its own telecommunications environment.
Although associated with Denmark, the Faroe Islands aren't automatically treated exactly like Denmark for roaming purposes.
Gibraltar is a British Overseas Territory and may be included by some UK providers, but network policies can vary.
The recurring lesson remains beautifully monotonous:
Check your exact tariff.
One of the strangest ways to receive an unexpected roaming charge is to never actually visit the country that charged you.
Welcome to inadvertent roaming.
Also called network drift, it happens when your phone automatically connects to a mobile network across a nearby international border.
Imagine you're travelling on the Greek island of Corfu.
Your phone may potentially detect an Albanian network across the water.
Or you're travelling through northern Italy near Switzerland.
Your device might connect to a Swiss network.
If that neighbouring country falls outside your roaming package, different charges could apply.
When travelling close to international borders:
Check which network your phone is connected to.
Consider disabling automatic network selection.
Manually select a network in the country you're actually visiting.
Pay attention to roaming alerts from your provider.
Check your roaming settings before crossing borders.
A few seconds in your phone settings can prevent a considerably more irritating conversation with your mobile provider later.
You have several options.
Some are traditional.
Some are considerably more convenient.
Many UK networks sell daily or multi-day roaming passes.
These can allow you to use your existing UK allowance abroad.
The advantage is convenience.
You keep using your existing SIM and don't need to configure another data plan.
But check:
Daily cost
Countries included
Data allowance
Fair-use policy
Speed restrictions
A £2.50 daily charge sounds modest on a weekend.
On a month-long European trip?
That's another matter.
This is the nuclear option.
Disable data roaming and your UK SIM won't use mobile data abroad.
Very effective for avoiding accidental data charges.
Less effective for actually using the internet.
You'll need to rely on Wi-Fi or another mobile-data connection.
Hotels, airports, cafés and restaurants frequently provide Wi-Fi.
This can reduce your mobile-data consumption.
But relying exclusively on Wi-Fi quickly becomes inconvenient when you need:
Maps
Transport information
Ride-hailing
Tickets
Translation
Restaurant directions
Public networks may also be inappropriate for sensitive activity.
Free Wi-Fi is useful.
Building your entire international connectivity strategy around it is less impressive.
Before leaving home, download:
Offline maps
Boarding passes
Hotel confirmations
Entertainment
Translation language packs
Important travel documents
This is worth doing even if you have mobile data.
It reduces your data consumption and provides a backup when coverage is weak.
But offline resources cannot replace real-time connectivity entirely.
Train cancellations rarely have the courtesy to happen according to your downloaded timetable.
For compatible smartphones, a travel eSIM provides another way to access mobile data abroad.
Instead of using your UK network's roaming data, you install a separate digital data plan for your destination.
This allows you to keep your regular SIM in your phone while directing mobile data through the travel eSIM.
For UK travellers visiting Europe, eSIMLLY provides travel eSIM options that can be purchased before departure.
And because eSIMLLY covers more than 160 countries and regions, travellers can choose connectivity based on their actual itinerary rather than assuming their UK provider's definition of "Europe" matches the map.
Travel eSIMs are particularly attractive for international trips because you can choose a plan around your journey.
Depending on available plans, travellers can consider:
Destination-specific data
Regional data
Different data allowances
Different validity periods
That makes them useful for everything from a weekend in Paris to a month-long European rail trip.
One of the biggest advantages of prepaid travel connectivity is predictability.
Instead of discovering roaming charges after using your phone, you select and purchase your travel data beforehand.
This can make budgeting easier.
Particularly if your UK network charges daily roaming fees.
With a travel eSIM handling your mobile data, you can avoid using your UK SIM's chargeable roaming data.
Your phone must be configured correctly.
Typically, that means:
Setting the travel eSIM as the mobile-data line.
Disabling data roaming on the UK SIM if necessary.
Enabling the appropriate settings for the travel eSIM according to its instructions.
This prevents your primary SIM from quietly consuming expensive roaming data in the background.
Many modern smartphones support Dual SIM functionality.
This can allow you to keep your UK SIM active while using a travel eSIM for data.
For example:
UK SIM: Your normal phone number
Travel eSIM: Mobile data abroad
This can be particularly convenient for travellers who want to remain reachable through their usual number while using another connection for internet access.
Remember that calls or texts handled through your UK network may still have roaming charges depending on your plan.
This is where travel eSIMs become particularly useful.
Imagine your itinerary is:
London → Paris → Amsterdam → Berlin → Prague → Vienna → Rome
Checking roaming terms repeatedly isn't anyone's idea of European culture.
A suitable regional travel eSIM can simplify connectivity across multiple supported destinations.
For travellers planning this kind of itinerary, eSIMLLY can provide an alternative to relying exclusively on daily roaming through a UK network.
Your ideal allowance depends on how you use your phone.
Mostly:
Maps
Basic browsing
Consider approximately:
3–5 GB for a short trip
Regular:
Maps
Social media
Browsing
Photo uploads
Music
Consider approximately:
5–10 GB per week
Frequent:
Video
Video calls
Remote work
Cloud applications
Social-media uploads
Consider larger allowances or available unlimited options.
Monitoring your usage during the trip helps prevent surprises.
Feature | UK Network Roaming | Travel eSIM |
Uses existing UK SIM | Yes | Separate digital SIM |
Daily fee possible | Yes | Usually prepaid plan pricing |
Fair-use restrictions | May apply | Depends on selected plan |
Multi-country options | Depends on network | Regional plans may be available |
Keep UK number | Yes | Usually possible with Dual SIM |
Purchase before travel | Passes may be available | Yes |
Physical SIM swap | No | No |
Cost known beforehand | Depends on plan | Generally yes |
Neither solution is universally best.
The important thing is comparing the actual cost for your trip.
A travel eSIM isn't necessary for every journey.
Your existing UK roaming may be perfectly reasonable if:
European roaming is already included.
Your trip is extremely short.
Your roaming allowance comfortably covers your usage.
You don't want to configure another SIM.
Check your plan first.
If you're already receiving exactly what you need at no extra cost, there's little reason to complicate things.
Consider a travel eSIM if:
Your network charges daily roaming fees.
You're travelling for several weeks.
You're visiting multiple countries.
Your destination isn't included in your UK roaming zone.
You need more data than your fair-use allowance.
You're visiting destinations such as Turkey or Switzerland where your network charges more.
You want a predictable prepaid data cost.
The longer and more complicated your trip, the more important the comparison becomes.
Before heading to the airport, check:
Is my destination included in my roaming zone?
Does my tariff charge a daily roaming fee?
What is my overseas data allowance?
Is there a fair-use limit?
What happens after I exceed it?
Are calls and texts included?
Are neighbouring countries classified differently?
Does my phone support eSIM?
Would a travel eSIM cost less?
Have I downloaded important documents offline?
Ten minutes of preparation can save a surprisingly unpleasant bill.
Post-Brexit roaming has made European mobile connectivity less predictable for UK travellers.
A trip from London to Spain may have one set of roaming conditions.
Switzerland could have another.
Turkey another.
And a multi-country Balkan itinerary could involve several different roaming classifications.
That's where eSIMLLY becomes particularly relevant.
Rather than relying entirely on how your UK network classifies each destination, compatible-device users can prepare travel data before leaving home.
For example:
Weekend in France? Choose connectivity appropriate for France.
Holiday in Turkey? Prepare a Turkey travel eSIM rather than assuming it's included in your UK European roaming zone.
Interrail across Europe? Consider a suitable regional option covering multiple supported destinations.
Europe followed by Asia? eSIMLLY provides travel eSIM services across 160+ countries and regions, so the same approach can extend beyond Europe.
The objective isn't simply to "avoid roaming."
It's to know what your connectivity will cost before you use it.
For UK travellers, the safest answer remains:
Sometimes—but never assume it is.
Brexit removed the legal guarantee that UK consumers would automatically benefit from the EU's Roam Like at Home framework through their British mobile provider.
As a result, roaming now depends heavily on your network, tariff and destination.
Some UK plans still include European roaming.
Others charge daily fees.
Fair-use limits may apply even when roaming is included.
And destinations such as Turkey, Switzerland, Andorra and several Balkan countries can sit outside the European roaming zones travellers expect.
So before leaving:
Check your destination. Check your network. Check your tariff. Check your fair-use allowance.
Then compare the total cost with alternatives.
For UK travellers specifically, eSIMLLY provides another way to approach European connectivity: arrange mobile data before departure, keep your existing UK SIM available where appropriate, and use a travel eSIM for data while abroad.
With travel eSIM services available across more than 160 countries and regions worldwide, eSIMLLY is especially relevant for trips that don't fit neatly into one UK network's roaming zone—whether that's a week in Turkey, a Swiss holiday, an Interrail journey across Europe or a longer multi-country adventure.
Europe hasn't become difficult to visit after Brexit.
The roaming small print has simply become considerably more interesting than anyone asked it to be.
You can also start you eSim journey now and get your best eSim Plans with eSIMLLY.
https://esimlly.com/en
Instant activation, hotspot included and no roaming fees in the destinations from this guide.

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