2. Choose widely circulated numbers, such as 1 14, 1 18,1/kloc-9, 1 16, etc.
3. According to the industry in which the enterprise is located, choose 400 phone numbers with homophones, such as 16 15 (I am here all the time), 12580 (I will help you), 13 14 (for life) and so on.
4. Rules for using the multiplication formula table, such as the tail number of 400 telephone is 372 1, 5630,9981,etc.
5. According to the area code of the city where the enterprise is located, select the 400 telephone number.
For example, customers in Beijing can choose 400601014, 4006114010.