In our business we get them as the "deaf phone calls." If I'm not swamped, I will play along long enough to get the crdt crd info in order to call the banks. They always ask if we sell guitars. I say yes, and they ask for a price. I always quote something outrageous. They have no problem with the price, and they'll want half a dozen shipped to Nigeria for a church program. It's a shame that they use a system designed to help hearing impaired people use the telephone.