# WR21 PIN change
**URL:** https://forums.digi.com/t/wr21-pin-change/18035
**Category:** Digi TransPort WR (Series)
**Tags:** wr21, change
**Created:** [February 15, 2017, 11:13am UTC](https://forums.digi.com/t/wr21-pin-change/18035 "2017-02-15T11:13:28Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Tomasz](https://forums.digi.com/u/Tomasz)
#### Post date: [February 15, 2017, 11:13am UTC](https://forums.digi.com/t/wr21-pin-change/18035/1 "2017-02-15T11:13:28Z")
Hello,
My question is how change PIN on SIM or add PIN to SIM when card not have a PIN ?.
Regards
Tomasz
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### Author:  [@James.Wilson](https://forums.digi.com/u/James.Wilson)
#### Post date: [February 16, 2017, 3:20am UTC](https://forums.digi.com/t/wr21-pin-change/18035/2 "2017-02-16T03:20:46Z")
Hi the easy way to change pin with a WR21
dont use a mobile phone when the sim is in the phone if it has a pin then you will have to enter it when the phone first boots up. once in you can go to security option and change pin or remove pin
you can do it on a wr21 but it would mean re configuring the router to have direct access to the module then use at commands to access the SIM
link to how to use some at commands
[http://dostmuhammad.com/blog/disable-pin-code-using-gsm-modem-at-commands/](http://dostmuhammad.com/blog/disable-pin-code-using-gsm-modem-at-commands/)
regards
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### Author:  [@Tomasz](https://forums.digi.com/u/Tomasz)
#### Post date: [February 16, 2017, 10:44am UTC](https://forums.digi.com/t/wr21-pin-change/18035/3 "2017-02-16T10:44:11Z")
Hello,
when I’m try use this command from your linkk I have error output:
ss431362\>AT+CPIN?
ERROR
ss431362\>
Regards
Tomasz
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### Author:  [@James.Wilson](https://forums.digi.com/u/James.Wilson)
#### Post date: [February 17, 2017, 2:53am UTC](https://forums.digi.com/t/wr21-pin-change/18035/4 "2017-02-17T02:53:45Z")
Yes thats because you are talking to the router and not the modules.
you have to disconect the module from the router
modemcc 0 asy\_add ?
modemcc 0 info\_asy\_add ?
makes a note of the 2 settings
modemcc 0 asy\_add 255
modemcc 0 info\_asy\_add 255
the module is now accessable
but if the router does not see data it will reboot the module so
modemcc 0 link\_retries ?
modemcc 0 stat\_retries ?
make a note of them
modemcc 0 link\_retries 10000
modemcc 0 stat\_retries 10000
this should give you some time to move to accessing the port.
simple way now is to telnet into the port assoiated to the asy\_info\_add you made not off
telnet 127.0.0.1 4006 -\> Last digit is the port number you recorded earlier
if you now type ati5 you should get a diffrent out put to the router
at commands should now be talking to the module
once you finish you need to put the configuration back or if you have not saved any changes reboot the router
regards
James