You're still running away. This gives temporary relief but now your anxiety is going to build up anticipating talking on the phone again. The only way to break the cycle is to stop running.... stop avoiding. Stuttering at its root a avoidance disorder. I used to have severe anxiety on the phone. Most of my life actually, up until the past year (I am 29). My heart would race as the phone ringed. I would avoid it like the plague. Make excuses, etc etc. Something clicked this past year for me. A lot happened in my life and I got a new job that required me to speak on the phone on a daily basis. So I made a choice I was no longer going to avoid the phone. I was no longer going to avoid stuttering. I took an approach to "attack" my feared speaking situations, instead of avoid them. I would go into them with courage. And I would praise myself for doing this after, as opposed to berate myself for stuttering as I had done in the past. The amazing part is how fast the anxiety goes away once you stop avoiding. Within one week of picking up the phone, practicing with random people on the App called Wakie, calling random stores and asking questions... it seemed like a lifetime of anxiety was going away. I still stutter when I talk on the phone. But the fear is gone, the negative feeling inside me has lessened tremendously. So what you stutter? The person on the other end is getting paid to listen to you, they will be cordial and patient. You just need to accept that you stutter as a first step. Once you make the choice to not avoid, it's like a switch it flipped in the brain and everything gets easier. **Practice stuttering forward instead of recoiling away from your blocks.** Don't substitute words or stop when you are blocking. Just go through the block to the other end. The tension will get less and less. I think you will surprise yourself at how fast you can turn this situation around.