The gist: AT&T is introducing lower cost plans, so if you have the current 2GB/month plan, you can save $ 15 a month (new price $ 40/month)by calling them up and asking. The old 1GB plan is being cancelled, which used to be $ 45/mo, so you can save some money by “upgrading” to 2GB.

In addition, if you are paying the $ 40/month subsidy for your phone, you can switch to a cheaper cost option for $ 25/mo.

From what I hear, AT&T isn’t making these changes automatically, so if you’re paying the higher rates, AT&T will let you continue paying those rates.

Much more details at this article:
http://www.theverge.com/2014/3/8/5484606/att-lowers-price-of-2gb-mobile-share-value-plan

AT&T page:
http://www.att.com/shop/wireless/data-plans.html#fbid=JvzPUXDwT0m