"The operator was the first to pre-empt EU regulation with its "Feel at Home" deals, which abolished roaming premiums for Three UK subscribers visiting 19 countries."
Well, not quite. My recollection is that it was a very literal interpretation of "like at home". So if you phoned for a taxi or hotel or restaurant whilst abroad, you would indeed have been charged just as if you "were at home" - i.e for a call to a foreign country. Sure, you could phone your neighbours or the cat back at home, but other than the data element it really did not amount to much of a deal.
Biting the hand that feeds IT
