There is a little (i) symbol next to each one, with a mouse over box that explains the throttling. The throttling is also explained if you click the link "important plan info."
The first option could be clearer with a parenthetical, but with the three right next to each other alongside the prices it's pretty clear what you're buying.
"Unlimited 4G LTE Data" for $40
"Unlimited 4G LTE Data (22 GB)" for $50
"Unlimited 4G LTE Data (75 GB)" for $60
There is a little (i) symbol next to each one, with a mouse over box that explains the throttling. The throttling is also explained if you click the link "important plan info."
The first option could be clearer with a parenthetical, but with the three right next to each other alongside the prices it's pretty clear what you're buying.