I feel like it's one of your bad days? As you know we all have bad days were our stuttering gets much worse and then we have our good days were our stutter is much more control. With that being said, if you said that you used to be able to say your name on the phone and now you can't, it could be one of your bad days, and hopefully, it will pass and you will be able to say it again, so don't get discourage bro!