Product info
Montecarlo eSIM plans
| 1GB prepaid eSIM · 7 days | $15.49$15.49 / GB | Buy eSIM |
| 2GB prepaid eSIM · 7 days | $29.79$14.89 / GB | Buy eSIM |
| 3GB prepaid eSIM · 14 days | $44.49$14.83 / GB | Buy eSIM |
| Ohayu recommends5GB prepaid eSIM · 30 days | $73.49$14.70 / GB | Buy eSIM |
| 10GB prepaid eSIM · 30 days | $146.99$14.70 / GB | Buy eSIM |
| 20GB prepaid eSIM · 90 days | $292.79$14.64 / GB | Buy eSIM |
You can install your eSIM before the trip and activate it when you arrive in Monaco. Validity starts after eSIM activation.
Plan details
How much mobile data you need
What's the best eSIM for Montecarlo?
A day or two – 1 GB
Maps, the casino, the harbour.
Grand Prix week – 3 GB
Photos, video, heavy uploading.
Monaco and the Riviera – 10 GB
Add a France plan for Nice and Menton.
A longer stay – 20 GB
Tethering in the principality.
Coverage and network
Coverage in two square kilometres
Monaco mobile networks
Monaco is about two square kilometres served by a single operator, Monaco Telecom, and coverage across it is comprehensive - there is not much of it to cover, and it is dense, wealthy and vertical. The complication is entirely about which network your phone chooses.
Monaco, specifically
- Monte Carlo, the Casino, Larvotto: Full 5G. Complete coverage across the principality.
- The tunnels and the multi-storey car parks: Monaco is built vertically into a cliff and moves people through tunnels, lifts and underground levels constantly. Signal drops in the deeper ones - and the Grand Prix tunnel is part of the actual road network.
- The border problem: This is the one that costs money. Monaco Telecom's network reaches into France, and French networks reach into Monaco. A phone in Nice or Menton can register on Monaco Telecom without you crossing anything, and then bill as non-EU roaming. Check the network name if you are anywhere near the border.
- Grand Prix week: Late May puts a very large crowd into a very small space. The network is built for it better than most, but expect congestion at the peaks.
- The port and the sea: Covered across the harbour. Boat trips out past the breakwater pick up French networks fairly quickly.
Monaco, and not the EU
This plan covers Monaco. The principality is in Schengen and uses the euro but is not an EU or EEA member, so EU roaming caps do not apply - and France next door is a separate plan.
How to install eSIM
Connected in 3 steps
- 01
Buy before you fly
Choose your data plan before your trip.
- 02
Download & install
Log in to your account, tap your eSIM, and follow the on-screen instructions.
- 03
Land & activate
Activate when you arrive in Monaco. Turn on roaming for the eSIM and it connects to a local network.
Before you buy, make sure your phone supports eSIM — see Ohayu compatible devices list or dial *#06#. It's a free request to your phone's settings. If you see the EID number — your phone is eSIM-compatible.
Arriving in Monaco
You arrive through France
Monaco has no airport. Almost everyone comes via Nice Côte d'Azur, then a train, bus, helicopter or car - all of which means time on French networks before you get here. That transfer is exactly where an unplanned roaming bill starts.
Side by side
Montecarlo eSIM Comparison
Indicative comparison based on publicly listed Monaco plans as of August 2026. Competitor pricing and policies change - check their sites for current terms.
Frequently asked questions
Does my EU or French plan cover Monaco?
No, and this is the expensive mistake here. Monaco is in Schengen and uses the euro, which leads people to assume EU roaming applies - it does not. The principality is neither an EU nor an EEA member, so roaming rates are uncapped and unregulated for European SIMs. Travellers report a few minutes of data costing more than ten euros.
My phone connected to Monaco Telecom while I was in France. What happens?
You get billed as though you were in Monaco, at non-EU roaming rates, without having left France. Monaco Telecom's masts cover a chunk of the surrounding French coast, and phones in Nice, Èze and Menton do latch onto them. If you are staying in France and visiting Monaco for the day, it is worth setting network selection manually and watching which network you are on.
Can I buy a local SIM in Monaco?
Not easily. Monaco Telecom is the only operator and no longer sells prepaid cards, so there is no walk-in tourist option of the kind you would find in France or Italy. That leaves roaming or an eSIM as the practical routes to data here.
eSIM not working in Monaco?
Check the network name first - near the border a phone may have registered on a French network instead, which this plan does not cover. In a tunnel or an underground level, a drop is the geography. Otherwise set Ohayu as the mobile data line, allow roaming, then toggle Airplane mode. Chat and support@ohayu.com are open 24/7.
