CoreESIM strongly advises completing the eSIM installation process prior to your departure. Installing your eSIM while you have a stable Wi-Fi connection at home or your current location ensures a smooth setup. Public Wi-Fi at Paris-Charles de Gaulle (CDG) Airport can be unreliable or require registration, potentially delaying your connectivity. Since your CoreESIM data plan's validity only commences upon its first connection to a French network, pre-installation means you'll have immediate internet access the moment you land in France.
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Should I install my CoreESIM before departure or upon arrival at CDG Airport?
Updated April 22, 2026
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