1, pay attention to your attitude, be polite, and pay attention to your tone whether the other party is interested or not.
2, you also need to pay attention to the time period of return visit, it is best not to disturb the customer's rest time during the break, I believe he will be very disgusted.
3. Don't make repeated phone calls, which will make you feel that it is a harassing phone call, and you are likely to be directly reported or blacked out.