The key is not learn how to not give a fuck, but how to actually fix the issue - which of course isn't easy. I have a HUGE problem with phone calls as well. Physical cues and gestures help me through blocks a lot, so when people *see* that I'm stuttering, it's actually easier. When I'm on the phone and I get in a block, people keep saying "hello?". The amount of times I've been hung up on because they thought I disconnected.... For me, the only solution is to try my best to let the person on the other line know beforehand that I stutter/have speech problem (if you want to be vague). I briefly explain what I just said - if you don't hear me, I'm stuck, not disconnected. Of course though, saying that in and of itself is another speech barrier, but it's always worth a try in my opinion. On rare occasion, I can pick up the phone and have perfect fluency, and other days I'm just a fucking brick. That being said, I feel like speaking on the phone will always be one of the biggest challenges for stutterers. My throat just locks up in panic and it's so hard to stop - I imagine it's the same for many others. I hope others reply to you post with more advice, because I could use some as well!