We are developing a voice communication device using EC-25J(STD).
Currently, we are successfully making voice calls using the following carrier sims
Softbank
NTT DOCOMO
However, with the following carriers’ sims, the connection fails.
KDDI au VOLTE Network (PLMN=44051)
The following command is used to unlock the facility lock.
AT+CLCK=“PF”,2"
AT+CLCK=“PN”,2"
AT+CLCK=“PU”,2"
AT+CLCK=“PP”,2"
AT+CLCK=“PC”,2"
If the status was “+CLCK: 1” with the above command, release it with the following command
AT+CLCK=“PF”,0, “12341234”
AT+CLCK=“PN”,0, “12341234”
AT+CLCK=“PU”,0, “12341234”
AT+CLCK=“PP”,0, “12341234”
AT+CLCK=“PC”,0, “12341234”
Is there a missing command to unlock the facility lock for KDDI sim?
Hello Tadahiro_Murakoshi, thank you for your question
You can follow the steps below to troubleshoot
- Execute AT+CPIN? command to check if the SIM card is locked
- Execute AT+QMBNCFG=“LIST” to check whether the MBN file is activated
- Execute at+qcfg=“ims” to check the configuration of IMS
If the MBN file is not activated, you can contact the local FAE and agent through support@quectel.com to confirm the reason for the inactivation and obtain the latest MBN file. Thank you.
Thank you for your answer.
When I ran the command you gave me, I got the following.
AT+CPIN?
+CPIN:READY
AT+QMBNCFG=“LIST”
+QMBNGPP",0x0st",1,1201909merciMBNCFVoLTE",0x05010D01,201803301
at+qcfg=“ims”
+QCFG: “ims”,0,0
The result was that the SIM card was not registered with IMS.
What should I do after this?
Hello, Japan KDDI only supports LTE network standard. If you need voice calls, you can only use Volte.
at+qcfg=“ims”
+QCFG: “ims”,0,0 indicates that the module or SIM card does not support IMS service and cannot perform Volte. Quectel EC25-J supports Volte function. Please confirm whether your KDDI SIM card supports Volte, thank you.