troubleshooting Chatty / modem? no SMS outbound

[bcnaz]

Any pointers on troubleshooting a modem that keeps unregistering?

I switched to USMobile SIM and cannot send SMS / MMS.  SMS & MMS _inbound_ does work (Yes, MMS in Chatty! ) and calls _do_ work inbound & outbound (voice is loud & clear!). 

Just SMS / MMS outbound is NOT working.  And when I try outbound, the modem goes back to "Unregistered", searching, and re-registers; but the "sent" SMS is never received ... logs make it sound like the modem is being rejected.

When I put this USMobile SIM into my daily driver (a MotoG8 running stock Android), everything works.  So it's not a borked SIM. 

One odd thing: my Moto8G modem detects this SIM's cellular network as "T-Mobile", but the APN & MMSC details in Android do indeed match USMobile's website for Androids.  Those APN & MMSC details are what I have setup in Mobian Bookworm.

I've put ModemManager into debug mode but don't really know what to look for ... and perhaps debug is overkill.  Did I miss something obvious in setting up USMobile?

Logs that repeat are below that have rejects in them:

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Code:

Feb 13 10:07:12 mobian ModemManager[604]: <info>  [modem0] power state updated: on Feb 13 10:07:12 mobian eg25manager[505]: Response: [+QIND: SMS DONE] Feb 13 10:07:12 mobian eg25manager[505]: Executed soft sleep sequence Feb 13 10:07:13 mobian ModemManager[604]: <info>  [modem0] 3GPP registration state changed (unknown -> searching) Feb 13 10:07:13 mobian ModemManager[604]: <warn>  [modem0] couldn't load operator code: Current operator MCC/MNC is still unknown Feb 13 10:07:13 mobian ModemManager[604]: <warn>  [modem0] couldn't load operator name: Current operator id is still unknown Feb 13 10:07:13 mobian ModemManager[604]: <info>  [modem0] state changed (enabling -> searching) Feb 13 10:07:13 mobian mmsdtng[2272]: ../plugins/modemmanager.c:modem_state_changed_cb() State Change: Old State: 5 New State: 7, Reason: 1 Feb 13 10:07:13 mobian mmsdtng[2272]: ../plugins/modemmanager.c:mmsd_mm_get_modem_state() MM_MODEM_GOOD_STATE: 7 Feb 13 10:07:13 mobian mmsdtng[2272]: ../plugins/modemmanager.c:mmsd_mm_state() MMSD_MM_STATE_READY Feb 13 10:07:13 mobian mmsdtng[2272]: ../plugins/modemmanager.c:mmsd_mm_state() Setting Bearer Handler Feb 13 10:07:13 mobian mmsdtng[2272]: ../src/service.c:mms_service_set_bearer_handler() service 0x55928f13d0 handler 0x5568a66820 Feb 13 10:07:13 mobian NetworkManager[500]: <info>  [1644768433.5067] modem["cdc-wdm0"]: modem state changed, 'enabling' --> 'searching' (reason: user-requested) Feb 13 10:07:52 mobian ModemManager[604]: <info>  [modem0] 3GPP registration state changed (searching -> idle) Feb 13 10:07:52 mobian ModemManager[604]: <info>  [modem0] state changed (searching -> enabled) Feb 13 10:07:52 mobian NetworkManager[500]: <info>  [1644768472.1250] modem["cdc-wdm0"]: modem state changed, 'searching' --> 'enabled' (reason: unknown) Feb 13 10:07:52 mobian mmsdtng[2272]: ../plugins/modemmanager.c:modem_state_changed_cb() State Change: Old State: 7 New State: 6, Reason: 0 Feb 13 10:07:52 mobian mmsdtng[2272]: ../plugins/modemmanager.c:mmsd_mm_get_modem_state() MM_MODEM_GOOD_STATE: 6 Feb 13 10:07:52 mobian ModemManager[604]: <warn>  [modem0] network reject indication received Feb 13 10:07:52 mobian mmsdtng[2272]: ../plugins/modemmanager.c:mmsd_mm_state() MMSD_MM_STATE_READY Feb 13 10:07:52 mobian ModemManager[604]: <warn>  [modem0]   service domain: ps Feb 13 10:07:52 mobian mmsdtng[2272]: ../plugins/modemmanager.c:mmsd_mm_state() Setting Bearer Handler Feb 13 10:07:52 mobian ModemManager[604]: <warn>  [modem0]   radio interface: lte Feb 13 10:07:52 mobian mmsdtng[2272]: ../src/service.c:mms_service_set_bearer_handler() service 0x55928f13d0 handler 0x5568a66820 Feb 13 10:07:52 mobian ModemManager[604]: <warn>  [modem0]   reject cause: ps-services-in-location-area-not-allowed Feb 13 10:07:52 mobian ModemManager[604]: <warn>  [modem0] network reject indication received Feb 13 10:07:52 mobian ModemManager[604]: <warn>  [modem0]   service domain: ps Feb 13 10:07:52 mobian ModemManager[604]: <warn>  [modem0]   radio interface: lte Feb 13 10:07:52 mobian ModemManager[604]: <warn>  [modem0]   reject cause: ps-services-in-location-area-not-allowed Feb 13 10:07:53 mobian ModemManager[604]: <warn>  [modem0] network reject indication received Feb 13 10:07:53 mobian ModemManager[604]: <warn>  [modem0]   service domain: cs-ps Feb 13 10:07:53 mobian ModemManager[604]: <warn>  [modem0]   radio interface: lte Feb 13 10:07:53 mobian ModemManager[604]: <warn>  [modem0]   reject cause: plmn-not-allowed Feb 13 10:07:53 mobian ModemManager[604]: <warn>  [modem0] network reject indication received Feb 13 10:07:53 mobian ModemManager[604]: <warn>  [modem0]   service domain: cs-ps Feb 13 10:07:53 mobian ModemManager[604]: <warn>  [modem0]   radio interface: lte Feb 13 10:07:53 mobian ModemManager[604]: <warn>  [modem0]   reject cause: roaming-in-location-area-not-allowed Feb 13 10:07:54 mobian ModemManager[604]: <info>  [modem0] 3GPP registration state changed (idle -> registering) Feb 13 10:07:54 mobian ModemManager[604]: <info>  [modem0] 3GPP registration state changed (registering -> home) Feb 13 10:07:54 mobian ModemManager[604]: <info>  [modem0] state changed (enabled -> registered) Feb 13 10:07:55 mobian mmsdtng[2272]: ../plugins/modemmanager.c:modem_state_changed_cb() State Change: Old State: 6 New State: 8, Reason: 0 Feb 13 10:07:55 mobian mmsdtng[2272]: ../plugins/modemmanager.c:mmsd_mm_get_modem_state() MM_MODEM_GOOD_STATE: 8 Feb 13 10:07:55 mobian mmsdtng[2272]: ../plugins/modemmanager.c:mmsd_mm_state() MMSD_MM_STATE_READY Feb 13 10:07:55 mobian mmsdtng[2272]: ../plugins/modemmanager.c:mmsd_mm_state() Setting Bearer Handler Feb 13 10:07:55 mobian mmsdtng[2272]: ../src/service.c:mms_service_set_bearer_handler() service 0x55928f13d0 handler 0x5568a66820 Feb 13 10:08:47 mobian NetworkManager[500]: <info>  [1644768527.4008] modem["cdc-wdm0"]: modem state changed, 'enabled' --> 'searching' (reason: unknown) Feb 13 10:08:49 mobian ModemManager[604]: <warn>  [modem0] network reject indication received Feb 13 10:08:49 mobian ModemManager[604]: <warn>  [modem0]   service domain: cs-ps Feb 13 10:08:49 mobian ModemManager[604]: <warn>  [modem0]   radio interface: lte Feb 13 10:08:49 mobian ModemManager[604]: <warn>  [modem0]   reject cause: plmn-not-allowed

Not certain it will apply here & now,
But an issue that sounded like your description -- from the Brave Heart days,
Is "Regions & Languages" completely filled in,  in the settings ?