I don’t see problem, you can use my application binary which is compiled by swi-fx30-catm_3.0.0.
modemDemo1.wp77xx.update (196.3 KB)
root@fx30:~# app status
[running] atAirVantage
[running] atQmiLinker
[running] atService
[running] audioService
[running] avcService
[running] cellNetService
[running] columbiaAtService
[running] dataConnectionService
[running] factoryRecoveryService
[running] fwupdateService
[running] gpioService
[running] modemService
[running] portService
[running] positioningService
[running] powerMgr
[running] qmiAirVantage
[running] secStore
[stopped] smsInboxService
[stopped] spiService
[stopped] tools
[stopped] voiceCallService
[stopped] wifi
[stopped] wifiApTest
[stopped] wifiClientTest
[running] wifiService
[stopped] wifiWebAp
[running] modemDemo1
root@fx30:~# app runProc modemDemo1 send --exe=send -- 1234567 "Sim"
root@fx30:~# cat /legato/systems/current/appsWriteable/modemDemo1/smsChat.txt
## SIM 1 is absent. ##
root@fx30:~# app runProc modemDemo1 send --exe=send -- 1234567 "Sim"
root@fx30:~# cat /legato/systems/current/appsWriteable/modemDemo1/smsChat.txt
## SIM 1 is absent. ##
## SIM 1 is absent. ##
root@fx30:~# legato version
19.11.5.a1621d58_27c4cd8552e17e79fdc3b0c91ff8bce9_modified
root@fx30:~# cm info
Device: WP7702
IMEI: 352653090002791
IMEISV: 6
FSN: VU735370340201
Firmware Version: SWI9X06Y_02.36.06.00 63d944 jenkins 2020/12/10 19:12:28
Bootloader Version: SWI9X06Y_02.36.06.00 63d944 jenkins 2020/12/10 19:12:28
MCU Version: 002.015
PRI Part Number (PN): 9907365
PRI Revision: 001.001
Carrier PRI Name: GENERIC
Carrier PRI Revision: 001.071_001
SKU: 1103530
Last Reset Cause: Reset, User Requested
Resets Count: Expected: 380 Unexpected: 28
root@fx30:~#