T-Mobile has come out with a new web ad that unsurprisingly takes another shot at its favorite punching bag: AT&T. Per CNET, the ad hits AT&T for allegedly being “calculating, sneaky and underhanded” with its AT&T Next early upgrade plan that the carrier unveiled as a response to T-Mobile’s own JUMP program. Whether AT&T Next is “sneaky” is certainly subjective, but independent analysis has shown that it clearly is more expensive, as ConsumerReports last week found that AT&T’s Next plan with a 3GB monthly data cap costs users around $1,830 per year while T-Mobile’s JUMP plan that offers unlimited data costs users $1,542 per year. AT&T has responded that its superior network coverage and connection speeds more than make up for the higher monthly rates it charges for its services. T-Mobile’s full ad follows below.