Prepaid mobile data has always been expensive in France, especially for those without French bank accounts or credit cards from neighboring countries.
Lycamobile has a new offer that seems too good to be true - if you top up at least €5 per month, you get unlimited data. The fine print says that the first 3GB is at 3G speed, then it drops to 2G.
http://www.lycamobile.fr/en/Unlimite...to-Lyca-calls-