I know that there is free wifi at CDG, but does anyone know how much of CDG has this? Will I be able to use the wifi at baggage claim? At the CDG RER station? Or does RER have wifi itself? (I assume it does not). I'm trying to coordinate with some people upon arrival, and will not be able to call until I get my sim card in Paris, so I'm wondering when I will be cut-off from my email. Thanks!