CDG is a maze on a good day, and the RER into Paris does not care whether you found Wi-Fi. Install a JamboSim France eSIM before you fly and you land online - tickets, maps and that first café address ready to go.
Free Wi-Fi covers the terminals but disappears on the RER. An eSIM keeps your maps live all the way to your hotel.
RER B runs from Terminals 2 and 3 to Gare du Nord in around 35 minutes; Roissybus goes to Opéra. Both are simplest with live departure info.
CDG has three terminals connected by the free CDGVAL shuttle. Local time is Central European Time.
RER B is the main rail link to Paris
Yes, you are online as soon as you switch on data after landing, inside the terminal.
Yes, a JamboSim France eSIM covers the whole country.
If you are hopping between countries, our Europe regional plan may fit you better.