Most of the AT commands are defined in 3GPP TS 51.011, but more and more UE makers are adding their own AT commands as well. In this page, I will keep adding the commonly used AT commands defined in 3GPP spec.
< USIM Read/Write >
Based on 27.007 8.18 Restricted SIM access +CRSM,
<command> (command passed on by the MT to the SIM);
176 READ BINARY
178 READ RECORD
192 GET RESPONSE
214 UPDATE BINARY
220 UPDATE RECORD
203 RETRIEVE DATA
219 SET DATA
For the Details refer to 27.007 and 51.011
Ex) Resetting FPLMN List, according to 51.011 10.3.16 EF_FPLMN (Forbidden PLMNs), file ID is 6F7B
# read FPLMN
Command : AT+CRSM=176,28539
Output : +CRSM: 144,0,"130014130062030294030205030223FFFFFF"
51.011 10.3.16 EFFPLMN (Forbidden PLMNs) describes FPLMN Field format as below.
# write FPLMN
 3GPP 27.007 - AT Command set for User Equipment
 3GPP 51.011 - Mobile Equipment (SIM-ME) interface