Prices in pounds · O2 prices checked 6 November 2026
O2 roaming in Montenegro vs a travel eSIM
In Montenegro, O2 uses its O2 Travel prices. Here is what that costs for a long weekend, a week and a fortnight, next to a data-only travel eSIM for the same trip.
Photo : Milos Lopusina on Unsplash
O2 vs eSIM in Montenegro: 3, 7 and 14 days
O2’s lowest published option in Montenegro for each trip length, next to a Graba SIM Montenegro plan with about 0.7 GB a day.
- 3 days
- 7 days
- 14 days
O2 roamingGraba SIM eSIM
| Trip | O2 | Graba SIM eSIM | Difference |
|---|---|---|---|
| A long weekend3 days | £21.00£7 a day × 3 | £8.753GB, 15 days | The eSIM is £12.25 less |
| A week7 days | £49.00£7 a day × 7 | £9.995GB, 30 days | The eSIM is £39.01 less |
| A fortnight14 days | £98.00£7 a day × 14 | £16.9910GB, 30 days | The eSIM is £81.01 less |
What’s included: O2: unlimited calls, texts and data, at up to 2 Mbps. Graba SIM: data only, prepaid; your O2 SIM stays in your phone for calls and texts. Graba SIM prices are live; O2 prices checked 6 November 2026.
Sources: O2 roaming (checked 6 November 2026). Prices change; check before you buy.
Graba SIM Montenegro plans: data, validity and total price
Each plan is a one-off price for one eSIM. It starts when it first connects in Montenegro, and hotspot use comes out of the same data.
Using your phone in Montenegro
- TIV Tivat
- TGD Podgorica
- DBV Dubrovnik (Croatia), for many Kotor transfers
- Kotor and the bay
- Strong in Kotor old town and around the bay.
- Budva and the coast
- Good along the Budva Riviera and in Sveti Stefan.
- Durmitor and the mountains
- Good in Žabljak; hiking trails and canyons have gaps.
- Lake Skadar
- Fine in the villages; parts of the lake are out of range.
Networks our Montenegro plans use: m:tel CGT-Mobile
- Montenegro uses the euro but isn’t in the EU. An EU roaming allowance on your UK plan may not cover it, so check the Montenegro row for your network on this page.
- On a day trip from Dubrovnik, your phone switches from a Croatian network to a Montenegrin one at the border. Turn data roaming off for your UK SIM before you cross.
Going further with O2
- Croatia (Dubrovnik and the Croatian coast): O2 charges Europe Zone: check your plan.
- Albania (the drive south to Albania): O2 charges £7 a day.
- Bosnia & Herzegovina (trips to Mostar and Trebinje): O2 charges Europe Zone: check your plan.
What you get for the money
O2 Travel Bolt On
- £7 a day, charged only on days you make a call, send a text or use data. Receiving calls and texts doesn’t trigger it.
- Calls to the UK and within the destination are included; calls to other countries are not.
- O2 Travel starts a 24-hour charge the first time you call, text or use data. Receiving calls and texts doesn’t start it.
Graba SIM Montenegro eSIM
- 5 plan sizes for Montenegro, from 1GB, 7 days to 20GB, 30 days, each a one-off price.
- Runs on m:tel CG, T-Mobile in Montenegro.
- Data only. Your O2 SIM stays on for calls and texts, so bank codes still reach you in Montenegro.
O2 in Montenegro: questions
How much does O2 roaming cost in Montenegro?
£7 a day with the O2 Travel Bolt On: unlimited calls, texts and data, at up to 2 Mbps. For a trip, that is 3 days: £21.00 (£7 a day × 3); 7 days: £49.00 (£7 a day × 7); 14 days: £98.00 (£7 a day × 14).
Is a travel eSIM cheaper than O2 in Montenegro?
It depends on the trip. Comparing O2’s lowest published option with a Graba SIM plan of about 0.7 GB a day: 3 days, the eSIM is £12.25 less; 7 days, the eSIM is £39.01 less; 14 days, the eSIM is £81.01 less. O2’s price also includes unlimited calls, texts and data, at up to 2 Mbps.
Is Montenegro included in EU roaming?
No. Montenegro isn’t in the EU, so the EU roaming rules don’t apply there. Some UK networks include it in their own deals and others charge extra: the network table on this page shows what each publishes.
Does a Montenegro eSIM work in Croatia?
No. A Montenegro plan covers Montenegro. If you start in Dubrovnik, your UK plan or a Croatia plan covers the Croatian side.