This is the Carrefour mobile site.
Calls to France are 39 cents per minute.
10 cents per SMS (20 cents if sent to a foreign country), 30 cents per MMS.
Nothing really new...
I saw a spot on TV about M6 Mobile.
They launced the prepaid card, sold in the newspapers shops but I think that is an Orange rebranding.
Anyway
this is their site.