SIM cannot be recognized using EM7430

IoT Modules MC/EM Series
1

The EM7430 is recognized on the Linux board, but the SIM is not recognized when inserted.
The board PC is a TinkerBoard3N running debian11.
The EM7430 is recognized, but when I insert a SIM card it is not recognized.
I tried inserting other SIMs and also inserting it into another board PC, but the results were the same.

Some execution commands are as follows:
AT!GOBIIMPREF?
!GOBIIMPREF:
preferred fw version: 02.24.05.06
preferred carrier name: GENERIC
preferred config name: GENERIC_002.026_000
current fw version: 02.24.05.06
current carrier name: GENERIC
current config name: GENERIC_002.026_000

OK
AT+CPIN?
+CME ERROR: SIM not inserted
ati3
Manufacturer: Sierra Wireless, Incorporated
Model: EM7430
Revision: SWI9X30C_02.24.05.06 r7040 CARMD-EV-FRMWR2 2017/05/19 06:23:09
MEID: 35907506477276
IMEI: 359075064772766
IMEI SV: 12
FSN: LR850786380210
+GCAP: +CGSM
AT!UIMS?
!UIMS: 0

I tried changing it to !UIMS: 1 but I get an error

2

have you the latest FW?
https://source.sierrawireless.com/resources/airprime/minicard/74xx/em_mc74xx-approved-fw-packages/#sthash.2PNzT7s6.dpbs

3

I tried updating the FW, but I got +CME ERROR: 10.
I tried setting UIMS to 1, but there was no change.
Could it be that the SIM is not being recognized depending on the type of nanoSIM?

AT!GOBIIMPREF?
!GOBIIMPREF:
preferred fw version: 02.39.00.00
preferred carrier name: GENERIC
preferred config name: GENERIC_002.085_000
preferred subpri index: 000
current fw version: 02.39.00.00
current carrier name: GENERIC
current config name: GENERIC_002.085_000
current subpri index: 000

OK
AT+CPIN?
+CME ERROR: 10
AT!UIMS?
!UIMS: 1

OK

4

when you set UIM:1, it is using SIM slot 2, are you putting your SIM card to that slot?
Please read the specification of EM7430.

5

I tried inserting it in both slots with the same result.

6

Have you tried some more sim cards?

Btw, what is the return of at!custom?

7

Sorry. When I changed the slot, the result was different.
AT+CPIN?
+CME ERROR: 13
AT!UIMS=1
OK
AT+CPIN?
+CME ERROR: 10

This was the same even if I inserted another SIM.

The result of the AT command is as follows:
at!custom?
!CUSTOM:
GPSENABLE 0x01
GPSLPM 0x01
GPSSEL 0x01
IPV6ENABLE 0x01
UIM2ENABLE 0x01
USBSERIALENABLE 0x01
SINGLEAPNSWITCH 0x01

OK

8

+CME ERROR: 13 → it means SIM failure
+CME ERROR: 10 → it means SIM not inserted.

I have no idea on this, maybe some hardware damage on the SIM slot.

9

I have two of the same device and the same thing happens on both, even when I swap out the sim for another one.

10

you might try other firmware with other PRI and see if there is any improvement.

BTW, I don’t quite see problem with my module:

ati3
Manufacturer: Sierra Wireless, Incorporated
Model: EM7455
Revision: SWI9X30C_02.38.00.00 rE3F3E55C03AE94 jenkins 2022/01/13 05:16:00
MEID: 35907306012345
IMEI: 359073060123458
IMEI SV: 22
FSN: LF539521312345
+GCAP: +CGSM


OK
at!impref?
!IMPREF:
 preferred fw version:    02.38.00.00
 preferred carrier name:  GENERIC
 preferred config name:   GENERIC_002.082_000
 preferred subpri index:  000
 current fw version:      02.38.00.00
 current carrier name:    GENERIC
 current config name:     GENERIC_002.082_000
 current subpri index:    000

OK
at!custom?
!CUSTOM:
             GPSENABLE          0x01
             GPSLPM             0x01
             GPSSEL             0x01
             IPV6ENABLE         0x01
             UIM2ENABLE         0x01
             SIMLPM             0x01
             SINGLEAPNSWITCH    0x01


OK
at+cpin?
+CPIN: READY

OK
at!uims?
!UIMS: 0

OK