I'm sorry, but I laughed a lot at 'I blink a lot.' So here's the deal. I'm 26 too, I have a block as well. It gets in the way of work sometimes (bartender), but, like you, I try not to let it *get in the way of my work* Well done on that bro, cos as you know, this doesn't affect how you do your job at all. I think that you should talk to your boss and just be like, 'yo, I'm not sure if you understood correctly but I have a speech impediment and it can affect me talking on the phone sometimes. So just know that when you call and I don't say anything (and you end up hanging up), that's not me being a dick. I just need more time sometimes.' People can never truly understand unless they've gone through it personally/know someone that has, but saying something to him and making him get that hey, there can be issues sometimes, should help. Good luck.