I really need help. My psycho ex-boyfriend will not stop calling me and texting me and saying horrible stuff and I really want it to stop. I want to have his number blocked but my phone won't do it. I heard that Blackberrys can block a specific number from calling and texting. Is that true? Is there an app that will block just that number? I'm with T-mobile if that is relevant in any way...and I can't change my phone number. Thanks for your help.