The “breakthrough” unlimited data deal with AT&T didn’t last long.

When Apple first introduced its AT&T 3G-equipped original iPad, both companies marketed it with an unlimited 3G wireless Internet plan that soon became unavailable for new buyers and left grandfathered customers enduring a speed throttle when AT&T decided you used their network too much.

Burned customers banded together and sued both Apple and AT&T for bait and switch unlimited broadband. The two companies have now decided to settle, and as well as a whopper payout for the attorneys who filed the class action case, original iPad owners are going to share the proceeds:

• Customers purchasing a 3G-ready iPad before June 7, 2010 will receive a $40 check from Apple, even if you still have a grandfathered unlimited data account.
• Customers purchasing a 3G-ready iPad before June 7, 2010 who never activated an AT&T unlimited tablet mobile data plan will get a $20 discount off AT&T’s current $50 a month data add-on for up to one year.

Customers complained the steep price premium they paid for a 3G-equipped iPad wasn’t worth Apple’s asking price once AT&T removed the unlimited data option that Steve Jobs called part of a breakthrough deal.

Customers will not receive any awards until after February of next year, when the settlement is expected to be approved.