I had a call/sms blocker installed. Easy filter I believe. I've unblocked the person and now when ever I try to call i get a message saying the number is no longer in service. Or when I try to text my phone gives me an error of class 255 cause 3. Now this person can send me texts just fine but for some reason my phone will not send anything to them. I've uninstalled the app. reinstalled and unblocked again. done a naand restore, wipe, and everything I can think of. I just don't get why my phone is doing this. any help would be appreciated.