User's Manual

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Appendix II AT Commands

AT+CPWD=SC

Write Command Response

AT+CPWD=SC,[Old_PIN],[New_PIN]<CR> <CR><LF>OK<CR><LF>

<CR><LF>ERROR<CR><LF>

Example

AT+CPWD=SC,0000,2008

AT+CPWD=SC,2008

ERROR

 Change PIN code “0000” to “2008”

 Command syntax is incorrect!

Remarks

The Write command is to change PIN code of SIM card.

[Old_PIN] is a string for the current PIN code, and [New_PIN] is a string for the new PIN code.

 PIN (Personal Identity Number) is a 4~8 digit access code which can be used to secure your

SIM card from use. If the wrong PIN is entered in more than three times, the SIM card will be

locked.