EM9191(linux/aarch64) not conncecting to 5G nr->not attached

IoT Modules
1

Hi, there,
We are currently working on EM9191 to connect to 5G network.
We did succeeded once by using the cmd provided in readme of ehe driver src folder

$ mbimcli -d /dev/mhi_0306_00.01.00_pipe_12 -p --set-radio-state=on;
$ mbim-network --profile=/etc/mbim-network.conf.au /dev/mhi_0306_00.01.00_pipe_12 start;
$ mbimcli -d /dev/mhi_0306_00.01.00_pipe_12 -v -p --query-ip-configuration
and set the network with the information shown.

But since then, we could not connect to 5G again.
Did a little bit research of the AT command.

Here is the information that might be useful.
ATI
Manufacturer: Sierra Wireless, Incorporated
Model: EM9191
Revision: SWIX55C_02.08.01.00 58f60e jenkins 2021/03/12 18:05:48
IMEI: 355890340501662
IMEI SV: 4
FSN: 8W1347524502A1
+GCAP: +CGSM

ATI8
Manufacturer: Sierra Wireless, Incorporated
Model: EM9191
Revision: SWIX55C_02.08.01.00 58f60e jenkins 2021/03/12 18:05:48
IMEI: 355890340501662
IMEI SV: 4
FSN: 8W1347524502A1
+GCAP: +CGSM

AT!BAND?
Index, Name
0C, NR5G ALL

AT!SELRAT?
!SELRAT: 00, Automatic

AT+CGDCONT?
+CGDCONT: 1,“IP”,“uad5gn.au-net.ne.jp”,“0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 2,“IP”,“uad5gn.au-net.ne.jp”,“0.0.0.0”,0,0,0,0,“”,0

AT+COPS=?
+COPS: (1,“KDDI”,“KDDI”,“44051”,7),(3,“SoftBank”,“SoftBank”,“44020”,7),(1,“999 001”,“999 001”,“999001”,7),(1,“440 52”,")

I don’t undestand why the PS state: is like always Not attached ?
And the NR5G band is “No band”?
Does it mean the module cannot detect the 5G band?

AT!GSTATUS?
!GSTATUS:
Current Time: 722 Temperature: 33
Modem Mitigate Level: 0 ModemProc Mitigate Level: 0
Reset Counter: 4 Mode: ONLINE
System mode: NR5G PS state: Not attached
IMS reg state: NOT REGISTERED IMS mode: Normal
IMS Srv State: UNKNOWN SMS,UNKNOWN VoIP
NR Tx Power: – TAC: 004088
Cell ID: 288
NR5G band: No band Carrier Index: 0
NR5G dl bw: 5 MHz NR5G ul bw: Unknown
NR5G Rx chan: 159600 NR5G Tx chan: 0
NR5G dl MIMO: 0 NR5G ul MIMO: 1
NR5G(mmw) Rx0 RSSI (dBm): — NR5G(mmw) Rx1 RSSI (dBm): —
NR5G RSRP (dBm): — NR5G RSRQ (dB): —
NR5G SINR (dB): —

BTW, the same sim card is also inserted into a iPhone and it is immediately recognized and 5G connected.

Please kindly help and thank you for your help in advance.
Best,

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