Registration denied error on EM7565

IoT Modules MC/EM Series
1

Hi,
I am trying to start network using qmicli commands on a EM7565 modem. The commands that I have executed are present in the footer of this message.

Everything was working fine till when I started getting registration denied error when I issue the command " qmicli -d /dev/cdc-wdm0 --nas-get-serving-system". The forbidden field also works fine. However when I insert the same sim card on a phone, it works fine.

Any help on this would be helpful

  1. Get Signal Strength
    qmicli -p -d /dev/cdc-wdm0 --device-open-qmi --nas-get-signal-strength

             If signal signal-strength returns as -128db (default) that mean modem is not receiving any signal. Check the modem operating mode using 
                         qmicli -d /dev/cdc-wdm0 --dms-get-operating-mode
         If it is low-power mode then set the operating mode to online.

  2. Set the device to online
    qmicli -d /dev/cdc-wdm0 --dms-set-operating-mode=online
    Run the get signal strength again and see if modem gets good signal strength.

  3. Check the registration status and it should show registered.
    qmicli -d /dev/cdc-wdm0 --nas-get-serving-system

  4. Check the data format. Otherwise leasing will fail.
    qmicli -d /dev/cdc-wdm0 -e
    if it comes as 802.3 then change it to raw-ip
    qmicli -d /dev/cdc-wdm0 -e raw-ip

  5. Start the N/W
    qmicli -p -d /dev/cdc-wdm0 --wds-start-network=honeywell01.com.attz --client-no-release-cid // to establish network.
    where honeywell01.com.attz is the APN

  6. Check the connection status. It should show as “connected”

             qmicli -p -d /dev/cdc-wdm0 --wds-get-packet-service-status

  7. Check the current settings. It will retun the IP4, wwan0 etc.
    qmicli --device=/dev/cdc-wdm0 --wds-get-current-settings

  8. Get the IP assigned and the lease
    udhcpc -q -f -i wwan0 // do this immediately after the network is started.

  9. ping 8.8.8.8

2

Not sure where you got those steps from, but this one is wrong. If you want to switch the kernel driver to raw-ip for this device you must use -E (i.e. --set-expected-data-format), instead of -e (i.e. --get-expected-data-format).

This has nothing to do with your specific issue with the denied registration, though.

3

What is the full output of that command?
If the modem is trying to register to a network where it’s forbidden, maybe it’s because the home network is no longer visible? Maybe the network you’re trying to attach to is LTE-only and your modem did a fallback to 3G or 2G? or something like that?

4

Hi Aleksander, thank you for your time. The full output is like
~ # qmicli -p -d /dev/cdc-wdm0 --nas-get-serving-system
[12 Dec 2019, 12:55:12] -Warning ** [/dev/cdc-wdm0] requested auto mode but no MBIM QMUX support available
[/dev/cdc-wdm0] Successfully got serving system:
Registration state: ‘registration-denied’
CS: ‘detached’
PS: ‘detached’
Selected network: ‘3gpp’
Radio interfaces: ‘1’
[0]: ‘lte’
Roaming status: ‘on’
Data service capabilities: ‘0’
Current PLMN:
MCC: ‘404’
MNC: ‘86’
Description: ‘’
Roaming indicators: ‘1’
[0]: ‘on’ (lte)
Detailed status:
Status: ‘limited’
Capability: ‘cs-ps’
HDR Status: ‘none’
HDR Hybrid: ‘no’
Forbidden: ‘yes’
Full operator code info:
MCC: ‘404’
MNC: ‘86’
MNC with PCS digit: ‘no’

5

So the forbidden state happens while in LTE. Maybe your account with the operator doesn’t allow 4G service?
When you put the SIM card in a phone and it works, is the phone in LTE as well? Or is it in 2G/3G?

6

We have a 4G plan with the operator. When the SIM is inserted into the phone, it uses 4G. I have confirmed that as well.

7

Hi @nithss,
Do you have access to the AT command port. If you do. Please make sure you enter a correct APN for your EM7565 using the command “AT+CGDCONT”.
Besides, please get the output from the following commands so I could have more info of what’s going on:
AT!ENTERCND=“A710”
ATI
AT+CPIN?
AT!IMPREF?
AT+COPS?
AT+CGDCONT?
AT!GSTATUS?