Attempting to read FPLMN throws error

[Anon Ware]

I am using the command AT+CRSM=176,28539,0,0,12 to attempt to read the FPLMN on the my nRF9160 DK. The modem firmware version is 1.3.5. See attached logs: 

(14:11:15.629) (>>) *** Booting nRF Connect SDK v3.0.0-3bfc46578e42 ***
(14:11:15.656) (>>) *** Using Zephyr OS v4.0.99-a0e545cb437a ***
(14:11:15.656) (>>) The AT host sample started
(14:11:15.880) (>>) Ready
(14:11:17.976) (<<) AT+CGMR
(14:11:18.039) (>>) mfw_nrf9160_1.3.5
(14:11:18.039) (>>) OK
(14:11:26.141) (<<) AT+CRSM=176,28539,0,0,12
(14:11:26.220) (>>) ERROR 

[Håkon Alseth]

Hi,

 

Set the device into a mode where it powers up your SIM card, for instance AT+CFUN=44:

https://docs.nordicsemi.com/bundle/ref_at_commands/page/REF/at_commands/mob_termination_ctrl_status/cfun_set.html

Then try to access the SIM.

  

Kind regards,

Håkon

[Anon Ware]

Hi, 

Thanks for your answer that allowed me to access the list. Can you please also confirm if there is a time period after which the list gets automatically cleared. Or what other ways are there to clear it besides using the AT command 

AT+CRSM=214,28539,0,0,12,"FFFFFFFFFFFFFFFFFFFFFFFF"

Thanks.

[Håkon Alseth]

Hi,

 

Glad to hear that you got it working. 

Anon Ware said:

Can you please also confirm if there is a time period after which the list gets automatically cleared. Or what other ways are there to clear it besides using the AT command 

When the FPLMN is cleared depends on the SIM card, and how it has been configured. Some will clear on reboot for instance.

This was briefly discussed in this older thread:  Non-persistent FPLMN 

 

Kind regards,

Håkon