Specifications

UC864-E/G AT Commands Reference Guide

80304ST10041a Rev. 3 - 18/07/08

+CRSM - Restricted SIM Access

[,<fileid>

[,<P1>,<P2>,<P3>

[,<data>]]]

required parameters. ME handles internally all SIM-ME interface locking and

file selection routines. As response to the command, ME sends the actual

SIM information parameters and response data.

Parameters:

<command> - command passed on by the ME to the SIM

176 - READ BINARY

178 - READ RECORD

192 - GET RESPONSE

214 - UPDATE BINARY

220 - UPDATE RECORD

242 - STATUS

<fileid> - identifier of an elementary data file on SIM. Mandatory for every

command except STATUS.

<P1>,<P2>,<P3> - parameter passed on by the ME to the SIM; they are

mandatory for every command except GET

RESPONSE and STATUS

0..255

<data> - information to be read/written to the SIM (hexadecimal character

format).

The response of the command is in the format:

+CRSM: <sw1>,<sw2>[,<response>]

where:

<sw1>,<sw2> - information from the SIM about the execution of the actual

command either on successful or on failed execution.

<response> - on a successful completion of the command previously

issued it gives the requested data (hexadecimal character

format). It’s not returned after a successful UPDATE BINARY

or UPDATE RECORD command.

Note: this command requires PIN authentication. However commands

READ BINARY and READ RECORD can be issued before PIN

authentication and if the SIM is blocked (after three failed PIN authentication

attempts) to access the contents of the Elementary Files.

Note: use only decimal numbers for parameters <command>, <fileid>,

<P1>, <P2> and <P3>.

AT+CRSM=? Test command returns the OK result code

Example

Read binary, ICCID(2FE2)

AT+CRSM=176,12258,0,0,10

+CRSM: 144,0,982850702001107686F4