Face to face interviews are far better for you. Stuttering is Demon for phone calls with strangers. Make yourself well prepared for the interview and be technically strong. Talk to the interviewer in a confident tone as you know subject better. Think yourself as a hero always always. Say "common on, I'm better than many useless mother fuckers who are doing jobs, add the f word often to raise the stubborn mind. Things will slowly change as you age more & parallely stuttering impact drastically reduce when your responsibility reduce in older ages.