I just dumped US Mobile after less than four months, setting a new speed record for hitting my tolerance-for-b.s. ceiling. I’d had high hopes for this relatively new MVNO, but it turns out I chose poorly. Switching wireless service providers is one of those things I don’t relish doing, but every few years I find that I’m in a one-way relationship with my carrier: I’m a loyal customer who’s taken for granted. When my provider isn’t willing to offer me the same deal it’s extending to new customers, my loyalty soon vanishes.