We all love our smartphones, but they are a costly addiction to support. According to Consumer Reports, American wireless subscribers saw their wireless bills increase by 7% between 2011 and 2012, and the big culprit is the continued proliferation of smartphones. Overall, 70% of wireless subscribers who took part in Consumer Reports’ survey owned smartphones this year, up from 50% in 2011. As the publication notes, “upgrading from a plain cell phone at a major carrier isn’t cheap” since “you have to buy the smart phone itself (usually $100 to $400 when signing a two-year contract) and fork over $70 to $110 a month for a plan with data service… a lot more than a basic phone plan, which generally costs $40 to $70 a month.”