Monaco eSIM

Do not assume so. Monaco is an independent state outside the European Union, and plans often list it separately from France or not at all. Check the country list on the plan before buying, and if you are staying several days pick one that names Monaco explicitly rather than just saying Europe.

Streets become the circuit and close in stages several days before the race, footpaths are rerouted, and temporary bridges are the only way across in places. Hotels and trains fill early, so book ahead and save your walking route offline — finding your way back late at night without data is far harder than it sounds.

Many people do, because trains from Nice take around twenty-odd minutes and run frequently, which saves a lot on accommodation. The trade-off is crossing a border twice a day, so your phone keeps switching networks; the simplest answer is a plan that covers both France and Monaco rather than one of them.

Most plans here start when the phone first connects to a network at the destination, so you can install in advance at home and switch it on after landing. Each plan page states its own rule.

No. The eSIM is a second line, so you keep your home number for SMS OTP. Turn off roaming data on the home line and set the eSIM as the data line.