AT&T today announced that it would be introducing new, “cheaper” wireless plans for its customers. While technically true, the 200 MB $15-a-month entry plan and a $25-a-month 2 GB plan replace the $29.99 unlimited plan for devices like the iPad.

“AT&T helps mobilize everything on the Internet your favorite web sites, TV shows, music, games and social networks. Virtually everything previously done while sitting at a computer can now be done on the go,” said Ralph de la Vega, president and CEO, AT&T Mobility and Consumer Markets. “To give more people the opportunity to experience these benefits, we’re breaking free from the traditional ‘one-size-fits-all’ pricing model and making the mobile Internet more affordable to a greater number of people.”

Current smart phone customers will not have to switch to the new plans, but can do so without extending their contract. An additional $20 a month will land users new tethering options for their phone and both plans have unlimited access to AT&T Wi-Fi hot spots.

According to AT&T, 98 percent of its smart phone customers use under 2 GB of data a month, while 65 percent use under 200 MB, which is a tacit explanation of the change.