Unable to connect (call_end_reason_verbose is 241)

I’m running an EC25-AF with Verizon SIM.

I get the following error continuously (it retries every 60 seconds).
call_end_reason is 1
call_end_reason_type is 2
call_end_reason_verbose is 241

I couldn’t find any docs on verbose call_end reasons. What’s 241 mean?

Here’s more output:
[03-22_20:38:14:911] Auto find qmichannel = /dev/cdc-wdm0
[03-22_20:38:14:911] Auto find usbnet_adapter = wwan0
[03-22_20:38:14:911] netcard driver = qmi_wwan, driver version = 22-Aug-2005
[03-22_20:38:14:911] Modem works in QMI mode
[03-22_20:38:14:917] cdc_wdm_fd = 7
[03-22_20:38:14:989] Get clientWDS = 17
[03-22_20:38:15:029] Get clientDMS = 2
[03-22_20:38:15:052] Get clientNAS = 3
[03-22_20:38:15:085] Get clientUIM = 2
[03-22_20:38:15:116] Get clientWDA = 1
[03-22_20:38:15:149] requestBaseBandVersion EC25AFFAR07A08M4G
[03-22_20:38:15:277] requestGetSIMStatus SIMStatus: SIM_READY
[03-22_20:38:15:278] requestSetProfile[1] vzwinternet///0
[03-22_20:38:15:340] requestGetProfile[1] vzwinternet///0
[03-22_20:38:15:372] requestRegistrationState2 MCC: 311, MNC: 480, PS: Attached, DataCap: LTE
[03-22_20:38:15:405] requestQueryDataCall IPv4ConnectionStatus: DISCONNECTED
[03-22_20:38:15:405] ifconfig wwan0 down
[03-22_20:38:15:415] ifconfig wwan0 0.0.0.0
[03-22_20:38:15:436] requestSetupDataCall QMUXResult = 0x1, QMUXError = 0xe
[03-22_20:38:15:437] call_end_reason is 1
[03-22_20:38:15:437] call_end_reason_type is 2
[03-22_20:38:15:437] call_end_reason_verbose is 241
[03-22_20:38:15:437] try to requestSetupDataCall 5 second later
[03-22_20:38:20:461] requestSetupDataCall QMUXResult = 0x1, QMUXError = 0xe
[03-22_20:38:20:461] call_end_reason is 1
[03-22_20:38:20:461] call_end_reason_type is 2
[03-22_20:38:20:461] call_end_reason_verbose is 241
[03-22_20:38:20:461] try to requestSetupDataCall 10 second later
[03-22_20:38:30:478] requestSetupDataCall QMUXResult = 0x1, QMUXError = 0xe
[03-22_20:38:30:478] call_end_reason is 1
[03-22_20:38:30:478] call_end_reason_type is 2
[03-22_20:38:30:478] call_end_reason_verbose is 241
[03-22_20:38:30:478] try to requestSetupDataCall 20 second later
[03-22_20:38:50:543] requestSetupDataCall QMUXResult = 0x1, QMUXError = 0xe
[03-22_20:38:50:543] call_end_reason is 1
[03-22_20:38:50:543] call_end_reason_type is 2
[03-22_20:38:50:543] call_end_reason_verbose is 241
[03-22_20:38:50:543] try to requestSetupDataCall 40 second later