We sure hope AT&T can get a signal from the top of that bandwagon. Starting tomorrow, AT&T is offering an unlimited data plan, following the lead of Verizon, T-Mobile, and Sprint. According to its press release, a four-line plan costs $180 for unlimited talk, text, and data. According to a CNET comparison, AT&T’s new plan wasn’t all that appealing on a line-by-line basis.