BlackBerry is ending its partnership with T-Mobile after a very public spat, but the decision to take a stand makes it seem like BlackBerry is working really hard to pound the nails into its own coffin. The phone manufacturer announced they will be cutting ties with T-Mobile on April 25th when their contract expires. BlackBerry is not interested in renegotiating the deal after the two companies battled it out over a T-Mobile promotion that came off as a bit disrespectful to the struggling handset maker. In mid-February, T-Mobile offered a promotion for existing T-Mobile Blackberry holders to trade in their device for an iPhone 5S with $0 down when they signed onto a new T-Mobile contract. The struggling BlackBerry does not have many customers left, but those remaining are fiercely loyal and so they took to social media to express their discontent.