How to configure/query phonebook number?

AT+CPBS=“SM” //choose “SM” type of phone book, which is to operate the phonebook saved in SIM card

AT+CSCS=“GSM” //Set the phonebook number and name as GSM format

AT+CPBW=1,“number” // Write phonebook entry whose index is 1

AT+CPBR=1 //Read phonebook entry whose index is 1