I joined the paid training 3 4 months back and they taught some techniques but following those techniques in real life seems difficult. I tried practicing for sometime but it did not help so I left that. FYI I have situational stammering, I can speak fluently when alone, in some situations I stammer less and in some situations I stammer more. While speaking hindi I stammer less but when speaking in english I stammer more and my project manager and client are from the US and because of that I have hard time communicating with them.