HUAWEI ME909u-523 LTE LGA Module
Application Guide
SIM Operation Application Scenarios
Issue 04 (2014-12-08)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
51
NOTE
To read or update a file, appropriate commands must be used according to the file's
structure type (for details, refer to the description of file properties in the
3GPP TS 31.102
protocol). For transparent structure files, use 176 (Read Binary) and 214 (Update Binary).
For linear fixed structure files, use 178 (Read Record) and 220 (Update Record).
If <pathid> is not contained in the command, the module will prefer to access the files with
the same FID in the current directory.
Files can be accessed only when the access criteria are met. Otherwise the SIM card will
return PSWs indicating that the access authentication failed. If an EF file's read privilege is
PIN protected and the module does not have the PIN authenticated, PSWs indicating that
the access authentication failed will be returned after the
AT+CRSM
command is used to
read the EF file.
To use the AT+CRSM command to access the file content on the SIM card, the parameters
contained in the command must strictly meet the requirements in the ETSI TS 102.221 and
3GPP TS 31.102. For detailed requirements, refer to the ETSI TS 102.221 and 3GPP TS
31.102.
7.2.2
Troubleshooting
Scenario
Possible Error
Information
Solution
Update the content of the
linear fixed structure EFsms
file on the SIM card.
AT+CRSM=178,12258,0,0,
10
+CRSM: 105,129,""
OK
The status word (SW)
indicates a Read command
error occurred. Files with a
transparent
structure should be
read using 176 (READ
BINARY).
Update the content of the
linear fixed structure EFsms
file on the SIM card.
AT+CRSM=220,28476,1,4,
176,"1111","7F10"
+CRSM: 105,130,""
OK
The PSW indicates that the
security conditions were not
met. To update the EFsms
file, the correct PIN is
required.
