"Some networks have been massively reducing the amount of data their customers are allowed to use on their tariffs recently, to as little as 500MB or even 250MB. Three have taken a step in the opposite direction: All-You-Can-Eat means All-You-Can-Eat. You wont be charged for your data, no matter how much internet you use on your phone. No unexpected charges, no hassle, and No Data Limits! However, you cannot use your phone SIM in another device. If you do, you will be charged for the data used as per out of bundle charges."
T-Mobile's small print:
"Our Full Monty plans will give you unlimited use of our internet on your phone service when you're in the UK. This means you can use as many MB/GB as you like and no fair use policy will apply."
Now they are unlimited data packages. Disappointed Virgin. Stop misleading customers with incorrect advertising. If you can't/won't offer "unlimited" data don't use the word. It's really quite simple.