I believe that is no longer the case, at least in Spain. Certain operators offer a 2nd SIM card (with the same number) for a few extra euros a month. In that c

I believe that is no longer the case, at least in Spain. Certain operators offer a 2nd SIM card (with the same number) for a few extra euros a month. In that case though, you can only speak through one of the phones at a time; however, both benefit from the data connection.