Contrary to a previous buyer said, perhaps deceived by the manual also claims that the (manufacturer of the precautionary principle?), This hotspot works fine with dual sim cut card. I am at Bouygues, with an offer BBox Nomad, who controlled the hotspot on amazon, I took the only sim card, got a double cut, put it in the machine and it works nickel. I'm 4G, with friendly rates: around 2 MB / s DL! Well it is far from the vaunted rates in pubs, finally, I remember making the hotline around 1995, and when we arrived at 1 kb / s, because it was connected to a 4T to states, it was madness. Today I dl 2000 times faster, and cell! This is crazy !!