American's habit Becourse of my work, I often need to find someone who has left a bad review on Amazon on Facebook and solve their dissatisfaction. However, I often can't find out them. Sometimes I can find some phone numbers on Google, of course, can not guarantee accuracy. But I dare not cal anyonel. It seems that Americans are very vigilant about strange calls. They don't answer the phone easily. What's more, because of the time difference, it is difficult for me to call them at the right time.