Also in Italy the price is wrong, Iliad offers 120GB for 9.99€ + SIM ( 9.99€ ), considering the worst case scenario ( using the offer for 1 month only ). It become 19.98€ for 120GB:
19.98 / (120 * 1024) * 1.39 = 0,00022€, almost 2 orders of magnitude less than 0.01$ ( 0.008€ ) ( pre-paid price shown in the website ). Price can go further down if you keep the SIM for 1 year or more:
( 9.99 * 13 ) / ( 120 * 12 * 1024 ) * 1.39 = 0,00012€
The only thing required to buy a SIM is a passport so every foreigner can buy one.
Unfortunately, if I'm not wrong, they don't have that plan anymore. Best they can do now is 100GB/€11.99 for new sims or 100GB/€7.99 with number portability, 4G LTE connectivity.
Not a great deal if you ask me. For example Iliad is offering 120GB/€9.99.
The only thing required to buy a SIM is a passport so every foreigner can buy one.