I have never tried any voice training products because, as unfounded as my belief might be, I don't believe that they work any faster or better than training your own voice to comfortably talk at a higher pitch than it already does. It's not the perfect solution but it's what I use. When the pitch turns lower, like from a cold, I never hesitate to tell the person on the other end of the phone what my true name is. That usually fixes things.
Wing Walker