Roaming ON, as you are in France.
All you have to do is simply change the APN in your phone to โmob.asm.netโ, it takes about 30 seconds.
You can use up to 12 GB of data within the EU. You will need an add on to use more than 12 GB or if you are travelling outside the EU.
Instructions on how to do this for both iPhone and Android are pinned at the top of the โFAQโ section of this forum.
