The mobile phone has made it's way into our lives for a number of reasons. If you have a solution for cell phone access for your vacation to France you would recommend, or not recommend, I think lots of people would be interested in hearing about it in the comments to this post.
I found this site that has longer explanations of the following options. Click here to see the entire article. If you want a cell phone in Europe, you have these options:
Why wouldn't you want to go to France? History, art, food, wine, what else is there?