[equestRegistrationState2] QMI connection issue of cellular IoT app shield

I’m using CELLULAR IOT APP SHIELD. I’m using usim which is out of my phone with Verizon carrier. When I try to connect via qmi, the error is as below. Does anyone know where is the error from? Does every single device need to be registered, e.g., IMEI number, for the usage, although BGxx module is certified by verizon?

pi@raspberrypi:~/files/quectel-CM $ sudo ./quectel-CM -s vzwinternet
[08-31_13:32:23:028] Quectel_QConnectManager_Linux_V1.6.0.12
[08-31_13:32:23:031] Find /sys/bus/usb/devices/1-1.4 idVendor=0x2c7c idProduct=0x296, bus=0x001, dev=0x005
[08-31_13:32:23:032] Auto find qmichannel = /dev/cdc-wdm0
[08-31_13:32:23:032] Auto find usbnet_adapter = wwan0
[08-31_13:32:23:033] netcard driver = qmi_wwan, driver version = 22-Aug-2005
[08-31_13:32:23:033] ioctl(0x89f3, qmap_settings) failed: Operation not supported, rc=-1
[08-31_13:32:23:034] Modem works in QMI mode
[08-31_13:32:23:071] cdc_wdm_fd = 7
[08-31_13:32:23:606] Get clientWDS = 1
[08-31_13:32:23:608] Get clientDMS = 1
[08-31_13:32:23:610] Get clientNAS = 1
[08-31_13:32:23:612] Get clientUIM = 1
[08-31_13:32:23:614] Get clientWDA = 1
[08-31_13:32:23:616] requestBaseBandVersion BG96MAR02A10M1G
[08-31_13:32:23:624] requestGetSIMStatus SIMStatus: SIM_READY
[08-31_13:32:23:624] requestSetProfile[1] vzwinternet///0
[08-31_13:32:23:638] requestGetProfile[1] vzwinternet///0
[08-31_13:32:23:642] requestRegistrationState2 MCC: 0, MNC: 0, PS: Detached, DataCap: UNKNOW
[08-31_13:32:23:646] requestQueryDataCall IPv4ConnectionStatus: DISCONNECTED
[08-31_13:32:23:646] ifconfig wwan0 down
[08-31_13:32:23:670] ifconfig wwan0 0.0.0.0
[08-31_13:32:33:862] requestRegistrationState2 MCC: 0, MNC: 0, PS: Detached, DataCap: UNKNOW
[08-31_13:33:13:154] requestRegistrationState2 MCC: 310, MNC: 260, PS: Detached, DataCap: UNKNOW
[08-31_13:33:13:162] requestRegistrationState2 MCC: 310, MNC: 260, PS: Detached, DataCap: UNKNOW
[08-31_13:33:16:868] requestRegistrationState2 MCC: 0, MNC: 0, PS: Detached, DataCap: UNKNOW
[08-31_13:33:29:866] requestRegistrationState2 MCC: 0, MNC: 0, PS: Detached, DataCap: UNKNOW
[08-31_13:34:08:750] requestRegistrationState2 MCC: 310, MNC: 260, PS: Detached, DataCap: UNKNOW
[08-31_13:34:08:760] requestRegistrationState2 MCC: 310, MNC: 260, PS: Detached, DataCap: UNKNOW
[08-31_13:34:11:872] requestRegistrationState2 MCC: 0, MNC: 0, PS: Detached, DataCap: UNKNOW
[08-31_13:34:24:876] requestRegistrationState2 MCC: 0, MNC: 0, PS: Detached, DataCap: UNKNOW
[08-31_13:35:04:348] requestRegistrationState2 MCC: 310, MNC: 260, PS: Detached, DataCap: UNKNOW
[08-31_13:35:04:356] requestRegistrationState2 MCC: 310, MNC: 260, PS: Detached, DataCap: UNKNOW
[08-31_13:35:07:878] requestRegistrationState2 MCC: 0, MNC: 0, PS: Detached, DataCap: UNKNOW
^C[08-31_13:35:08:180] QmiWwanThread exit
[08-31_13:35:08:181] qmi_main exit