What is the data signal reliability on French public transport, like the Metro and TGV?

France boasts an advanced telecommunications infrastructure, ensuring reliable data connectivity even on public transport. When navigating the Paris Métro, you can expect consistent 4G/LTE (and increasingly 5G) coverage within stations and tunnels, facilitating real-time map access or communication. Similarly, on high-speed TGV trains connecting cities like Paris, Lyon, and Marseille, coverage is generally robust throughout the journey, although very brief signal drops might occur in remote rural sections. eSIM Routes leverages these networks to keep you connected.