Two Weeks Driving the Balkans: Where UK Roaming Stops

On a two-week Balkans loop your phone passes through three different kinds of country, and only one of them behaves the way a UK traveller expects. Croatia, Slovenia and Greece are in the EU. Serbia, Montenegro, North Macedonia, Albania, Bosnia and Herzegovina and Kosovo are not. Romania and Bulgaria are in both the EU and, since land border controls were lifted on 1 January 2025, the Schengen area as well. Those are three separate lines drawn on the same map, they do not overlap, and a phone bill is one of the few places where the difference shows up as money.

Three kinds of border in one fortnight

The lines are worth holding apart because people routinely collapse them. The EU is a political and economic union. Schengen is an arrangement about passport checks. The eurozone is about currency. A country can be in one and not the others, and the Balkans is where that gets most tangled: Montenegro uses the euro without being in the EU or the eurozone, having adopted the currency unilaterally, so the money in your pocket works while none of the EU’s rules follow it. Roaming rules track the first of those three lines, not the currency and not the passport queue — which is why paying in euros in Podgorica tells you nothing whatsoever about what your phone is costing you.

What that means for a UK-registered phone

Since Brexit, roaming in Europe is set by each UK operator individually. Whatever your tariff includes, it almost certainly describes the EU or the wider EEA, and the Western Balkans sit outside both. Some UK and EU operators have voluntarily extended reduced roaming rates into the region since 2023, but that is a commercial decision rather than a rule, and it varies operator by operator. So the check is specific: not “does my plan cover Europe” but “does my plan name Serbia, Montenegro, North Macedonia, Albania, Bosnia and Herzegovina and Kosovo individually”. If it does not name them, assume they are charged at the out-of-bundle rate. How EU roaming rules work sets out what those rules do and do not reach.

On the loop	EU?	What it means for the phone
Slovenia, Croatia, Greece	Yes	EU roaming terms apply if your tariff includes the EU
Romania, Bulgaria	Yes, and in Schengen since January 2025	No passport queue at land borders; roaming unchanged by that
Serbia, North Macedonia, Albania	No	Outside EU roaming rules; check the country by name
Montenegro	No, despite using the euro	Euro prices, non-EU roaming
Bosnia and Herzegovina, Kosovo	No	Outside EU roaming rules; also often outside regional plans

The bill that arrives before you cross

The mechanism that actually costs people money on this route is not the crossing itself, it is the approach to it. A phone chooses whichever network is strongest, and near a border the strongest signal is frequently the one on the other side. So a car parked at a viewpoint above a valley, or crawling through the queue at a crossing point, can register on the neighbouring country’s network while still physically in the country it has not left — and be billed at that country’s rate. On a fortnight of border crossings this happens repeatedly and silently. Two habits fix it: look at the network name in the status bar rather than assuming, and turn off automatic network selection when you are near a border you have not crossed yet, choosing the local operator by hand. Both live in the same corner of the network settings on every phone.

Coverage on the road is not coverage in the city

Mobile coverage across the region is generally good in cities and along main corridors and thins out exactly where the driving is best — mountain roads in Montenegro and northern Albania, the interior of Bosnia, high passes anywhere. That is normal, it is not a plan problem, and no eSIM or SIM fixes terrain. What fixes it is preparation: download offline maps for every country on the route before you leave, keep accommodation addresses and booking references somewhere that opens without a connection, and do not rely on live navigation to find a guesthouse up a valley at dusk. Ferry legs on the Adriatic have the same character — no signal at sea, a normal registration on arrival.

The paperwork the barrier actually asks for

Two things travel with the car rather than the phone, and both are worth settling before departure. Vehicle insurance cover outside the EU is not automatic, and some non-EU crossings in the region still ask for a Green Card, so ask your insurer specifically which countries on your list are included rather than assuming the policy follows you. Road charging also changes shape as you go: some countries sell a time-based vignette you must buy before joining the motorway, others run toll booths, and a few do both on different roads. The systems and their prices change year to year, so buy from the official national channel at the border or online rather than a roadside stall, and check the current rules for each country before you drive rather than after.

Entry rules and the last check

Entry requirements for the non-EU countries on this route have been revised repeatedly, and 2026 is not the year to rely on what a forum said in 2019 — check the current position for your passport with each country’s own consular service or embassy before you go, and remember that a carrier or border post checks documents against today’s rules, not last year’s. The connectivity check is simpler. Write down every country in driving order, including the ones you only pass through, then hold that list against the coverage your plan actually names. How to check a route is covered walks through it, and the coverage and pricing page is the list to check against. If your loop starts with a drive from the UK, the Eurotunnel motorhome post covers the first half of that journey.