I have problem with two MC7455's after firmware update.
I used that script: https://wirelessjoint.com/viewtopic.php?t=72
After update modem lost IMEI so I used method from that post to recover IMEI: https://wirelessjoint.com/viewtopic.php?p=47 ... 850d#p4795
I also tried to flash firmware manually by qmi-firmware update, I tried also with .exe from Sierra on windows.
Now, situation with both modems are pretty similar. Modem with recovered IMEI don't want to register in network, also signal quality is 0% and ONLY gsm-umts is supported. Modem only after update changed supported modes from gsm-umts, lte to gsm-umts what is strange.
What I noticed, when I want to set AT!SELRAT=06, AT answer is ERROR.
Logs from both Sierras:
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mmcli -m 3
--------------------------------
General | path: /org/freedesktop/ModemManager1/Modem/3
| device id: ba39a52a627c7a7b02f5c469f06ae6f570cb45e3
--------------------------------
Hardware | manufacturer: Sierra Wireless, Incorporated
| model: MC7455
| firmware revision: SWI9X30C_02.33.03.00
| carrier config: default
| h/w revision: MC7455
| supported: gsm-umts
| current: gsm-umts
| equipment id: 359072065791622
--------------------------------
System | device: /sys/devices/pci0000:00/0000:00:14.0/usb3/3-7
| drivers: cdc_mbim, qcserial
| plugin: sierra
| primary port: cdc-wdm1
| ports: cdc-wdm1 (mbim), ttyUSB0 (qcdm), ttyUSB1 (gps),
| ttyUSB2 (at), wwan0 (net)
--------------------------------
Status | unlock retries: sim-pin2 (3)
| state: searching
| power state: on
| signal quality: 0% (cached)
--------------------------------
Modes | supported: allowed: 3g; preferred: none
| current: allowed: 3g; preferred: none
--------------------------------
Bands | supported: utran-1, utran-3, utran-4, utran-5, utran-8, utran-2
| current: utran-1, utran-3, utran-4, utran-5, utran-8, utran-2
--------------------------------
IP | supported: ipv4, ipv6, ipv4v6
--------------------------------
3GPP | imei: 359072065791622
| enabled locks: fixed-dialing
| registration: searching
--------------------------------
3GPP EPS | ue mode of operation: csps-2
--------------------------------
SIM | primary sim path: /org/freedesktop/ModemManager1/SIM/2
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ATI
Manufacturer: Sierra Wireless, Incorporated
Model: MC7455
Revision: SWI9X30C_02.33.03.00 r8209 CARMD-EV-FRMWR2 2019/08/28 20:59:30
ESN: 12807520841, 8072C249
IMEI: 359072065791622
IMEI SV: 20
FSN: LQ933105050310
+GCAP: +CGSM
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AT!IMPREF?
!IMPREF:
preferred fw version: 02.33.03.00
preferred carrier name: GENERIC
preferred config name: GENERIC_002.072_000
preferred subpri index: 000
current fw version: 02.33.03.00
current carrier name: GENERIC
current config name: GENERIC_002.072_000
current subpri index: 000
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AT!GSTATUS?
!GSTATUS:
Current Time: 986 Temperature: 30
Reset Counter: 1 Mode: ONLINE
System mode: WCDMA PS state: Not attached
WCDMA band: WCDMA 1700
WCDMA channel: 1962
GMM (PS) state:DEREGISTERED PLMN SEARCH
MM (CS) state: IDLE PLMN SEARCH
WCDMA L1 state:L1M_ACQ LAC: 0000 (0)
RRC state: DISCONNECTED UTRAN Cell ID: 02C53D9E (46480798)
RxM RSSI C0: --- RxD RSSI C0: ---
RxM RSSI C1: --- RxD RSSI C1: ---
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AT!ENTERCND="A710"
OK
AT!SELRAT=06
ERROR
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AT!BAND?
Index, Name, GW Band Mask L Band Mask TDS Band Mask
00, All bands, 0002000007C00000 00000100330818DF 0000000000000000
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--------------------------------
General | path: /org/freedesktop/ModemManager1/Modem/0
| device id: 23d5a0b50fca7cf994a2f2625b3e009b829c0798
--------------------------------
Hardware | manufacturer: Sierra Wireless, Incorporated
| model: MC7455
| firmware revision: SWI9X30C_02.30.01.01 r7792 CARMD-EV-FRMWR2 2018/07/13 02:24:52
| carrier config: default
| h/w revision: 1.0
| supported: gsm-umts
| current: gsm-umts
| equipment id: 359072065789592
--------------------------------
System | device: /sys/devices/pci0000:00/0000:00:14.0/usb3/3-7
| drivers: qcserial, qmi_wwan
| plugin: sierra
| primary port: cdc-wdm1
| ports: cdc-wdm1 (qmi), ttyUSB0 (qcdm), ttyUSB1 (gps),
| ttyUSB2 (at), wwan0 (net)
--------------------------------
Status | lock: sim-pin2
| unlock retries: sim-pin (3), sim-puk (10), sim-pin2 (3), sim-puk2 (10)
| state: enabled
| power state: on
| signal quality: 0% (cached)
--------------------------------
Modes | supported: allowed: 3g; preferred: none
| current: allowed: 3g; preferred: none
--------------------------------
Bands | supported: utran-1, utran-3, utran-4, utran-5, utran-8, utran-2
| current: utran-1, utran-3, utran-4, utran-5, utran-8, utran-2
--------------------------------
IP | supported: ipv4, ipv6, ipv4v6
--------------------------------
3GPP | imei: 359072065789592
| enabled locks: fixed-dialing
| operator id: 26003
| registration: idle
--------------------------------
3GPP EPS | ue mode of operation: csps-2
--------------------------------
SIM | primary sim path: /org/freedesktop/ModemManager1/SIM/0
| sim slot paths: slot 1: /org/freedesktop/ModemManager1/SIM/0 (active)
| slot 2: none
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ati
Manufacturer: Sierra Wireless, Incorporated
Model: MC7455
Revision: SWI9X30C_02.30.01.01 r7792 CARMD-EV-FRMWR2 2018/07/13 02:24:52
MEID: 35907206578959
IMEI: 359072065789592
IMEI SV: 16
FSN: LQ904605240310
+GCAP: +CGSM
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AT!IMPREF?
!IMPREF:
preferred fw version: 02.30.01.01
preferred carrier name: GENERIC
preferred config name: GENERIC_002.045_001
current fw version: 02.30.01.01
current carrier name: GENERIC
current config name: GENERIC_002.045_001
Code: Select all
AT!GSTATUS?
!GSTATUS:
Current Time: 198 Temperature: 31
Reset Counter: 1 Mode: ONLINE
System mode: WCDMA PS state: Not attached
WCDMA band: WCDMA 2100
WCDMA channel: 10762
MM (CS) state: IDLE UPDATING
WCDMA L1 state:L1M_PCH_SLEEP LAC: 0000 (0)
RRC state: DISCONNECTED UTRAN Cell ID: 0C80BD14 (209763604)
RxM RSSI C0: -60 RxD RSSI C0: ---
RxM RSSI C1: --- RxD RSSI C1: ---
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AT!ENTERCND="A710"
OK
AT!SELRAT=06
ERROR
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AT!BAND?
Index, Name, GW Band Mask L Band Mask TDS Band Mask
00, All bands, 0002000007C00000 00000100330818DF 0000000000000000
I tried also AT!RMARESET=01 but without any change.
Of course antenna is ok, on another modems works fine.
Maybe someone knows what's the problem is?
EDIT: I reflashed first modem with FW version that came from the factory. Now registration in network is okay but still no connection. On both modules I have:
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AT+COPS=?
+COPS: (1,"Orange PL","Orange","26003",2),(1,"T-Mobile.pl","TM PL","26002",2),(1,"Plus","PLUS","26001",2),(1,"Play","Play","26006",2),,(0,1,2,3,4),(0,1,2)
OK
AT+COPS=1,2,"26003"
+CME ERROR: 30
AT+CSQ
+CSQ: 26,99
