BlackBerrys new CEO John Chen is taking issue with what appears to be a fairly innocent T-Mobile promotion. Last week, T-Mobile sent out an email to some customers currently using a BlackBerry phone urging them to upgrade to Apples iPhone 5S for no money down. Now, it seems like Chen has taken a somewhat-unreasonable amount of offense to the promotion — hes just penned a blog post in which he says hes outraged over T-Mobiles promotion. In the post, Chen applauds BlackBerry users who reached out to T-Mobile to defend the beleaguered phone maker, and says that loyalty draws a sharp contrast with the behavior of our longtime business partner.