To no one’s surprise, AT&T will offer a new unlimited data plan for all of its customers starting tomorrow. The move comes approximately 30 seconds after Verizon made a similar move. The only difference: AT&T’s offering is spendy as hell. The new plan will cover talk, text, and data on four lines for the wallet-busting price of $180 a month. Well, it’s only $180 a month with a “$40 credit for 4th smartphone line.