[Hilo] How to read Service Provider Name from SIM card by +CRSM?
Answer: This name is contained in a file in the SIM card. The file is called EF SPN (Service Provider Name), you can access to it with <AT+CRSM=176,28486,0,0,17>
The name is 16 Bytes long from Byte 2 to 17. For example:
+CRSM: 144,0,“00434D4343FFFFFFFFFFFFFFFFFFFFFFFF” ( “CMCC”)
You can have more information on 3GPP documentation ETSI TS 131 102.