People in my mobile phone text message sent me a text message. Why didn't they show their names, only their numbers?

Sometimes: a name can only correspond to one number. If this person has two numbers, he must create another business card with different names. 1: A business card cannot have more than two phone numbers; 2. Two different business cards cannot have the same number. 3. The business card in the SIM card cannot be duplicated with the mobile phone card holder, that is, a business card cannot be in the SIM card and the mobile phone card holder at the same time! 4: If the number is prefixed with 86, delete 86. Solution: (The above conditions must be met) 1: Not all business cards have this problem. It is suggested to delete the business cards that are not displayed on the SIM card and only store them on the mobile phone. 2. The ultimate method: store all numbers in the mobile phone business card, and then delete all SIM card business cards; 3. Check the SIM card name card: enter the name card book-Options -SIM card name card -SIM card phone book.