BlackBerry users on T-Mobile who want to upgrade will now receive $250 towards any BlackBerry phone, or $200 toward any other manufacturers phone in T-Mobile stores. The deal was introduced after a recent furore between BlackBerry and T-Mobile in which the carrier sent out an email to its BlackBerry-using customers that urged them to upgrade to an iPhone 5S for a discounted price. In response, BlackBerry CEO John Chen penned an outraged blog post in which he blasted the clearly inappropriate and ill-conceived marketing promotion, and lauded the significant number of BlackBerry fans whod contacted T-Mobile CEO John Legere directly to complain about the email.