If you are one of the “lucky” few that still has one of AT&T’s original unlimited data plans, the company is trying its best to get you to jump ship once and for all. The plan has its origins dating all the way back to the original iPhone that was first released in 2007.
The unlimited data plan originally cost $30 a month, but was raised

Source: Hot Hardware – Buzzkill AT&T Slaps Another Increase On Grandfathered Unlimited Data Plans