EM7411 - Verizon FW does not register, but GENERIC does

IoT Modules MC/EM Series
#1

I have an EM7411 with a Verizon SIM. The generic firmware that comes with the device (after doing at!rmareset) registers on the network successfully:

at!impref?
!IMPREF:
 preferred fw version:    01.14.03.00
 preferred carrier name:  GENERIC
 preferred config name:   GENERIC_002.036_000
 preferred subpri index:  000
 current fw version:      01.14.03.00
 current carrier name:    GENERIC
 current config name:     GENERIC_002.036_000
 current subpri index:    000

OK
at!gstatus?
!GSTATUS:
Current Time:  78               Temperature: 33
Reset Counter: 22               Mode:        ONLINE
System mode:   LTE              PS state:    Attached
LTE band:      B13              LTE bw:      10 MHz
LTE Rx chan:   5230             LTE Tx chan: 23230
LTE SCC1 state:INACTIVE         LTE SCC1 band: B4
LTE SCC1 bw  : 20 MHz           LTE SCC1 chan: 2300
LTE SCC2 state:NOT ASSIGNED
LTE SCC3 state:NOT ASSIGNED
LTE SCC4 state:NOT ASSIGNED
EMM state:     Registered       Normal Service
RRC state:     RRC Connected
IMS reg state: No Srv

PCC RxM RSSI:  -65              PCC RxM RSRP:  -97
PCC RxD RSSI:  -65              PCC RxD RSRP:  -96
SCC1 RxM RSSI: -87              SCC1 RxM RSRP: -118
SCC1 RxD RSSI: -84              SCC1 RxD RSRP: -108
Tx Power:      --               TAC:         d802 (55298)
RSRQ (dB):     -17.3            Cell ID:     034c3902 (55326978)
SINR (dB):     -6.6


OK

However, after downloading the Verizon firmware into the device, the registration no longer succeeds. The device will continue to register and deregister in infinite loops and never complete any registration:

at!impref?
!IMPREF:
 preferred fw version:    01.14.07.00
 preferred carrier name:  VERIZON
 preferred config name:   VERIZON_002.045_005
 preferred subpri index:  000
 current fw version:      01.14.07.00
 current carrier name:    VERIZON
 current config name:     VERIZON_002.045_005
 current subpri index:    000

at!gstatus?
!GSTATUS:
Current Time:  55               Temperature: 36
Reset Counter: 27               Mode:        ONLINE
System mode:   LTE              PS state:    Not attached
LTE band:      No band          LTE bw:      1.4 MHz
LTE Rx chan:   0                LTE Tx chan: 4294967295
LTE SCC1 state:NOT ASSIGNED
LTE SCC2 state:NOT ASSIGNED
LTE SCC3 state:NOT ASSIGNED
LTE SCC4 state:NOT ASSIGNED
EMM state:     Deregistered     Attach Needed
RRC state:     RRC Releasing
IMS reg state: No Srv           IMS mode:    Normal

PCC RxM RSSI:  0                PCC RxM RSRP:  0
PCC RxD RSSI:  0                PCC RxD RSRP:  0
Tx Power:      --               TAC:         ffff (65535)
RSRQ (dB):     0.0              Cell ID:     ffffffff (4294967295)
SINR (dB):     0

Why would the Verizon firmware not connect to the Verizon network? Is it safe to continue with the GENERIC firmware?

#2

An update on this topic. If I clear all the at+cgdcont entries and then do a at!reset, it registers successfully. It does not seem to persist upon reboot though.

The verizon firmware appears broken. If anyone falls into this issue, I recommend just using the original generic fw.

#3

Verizon SIM should be used with Verizon FW. With Verizon FW, you need profiles to be set properly as below
1,“IPV4V6”,“IMS”
2,“IPV4V6”,“VZWADMIN”
3,“IPV4V6”,“VZWINTERNET”
4,“IPV4V6”,“VZWAPP”
5,“IPV4V6”,“VZWEMERGENCY”
6,“IPV4V6”,“VZWCLASS6”

1,2 and 3 are very important. 5 could be different for you. Please check if your profiles 1,2,3 are set as above, AT!RESET and check if the modem registers properly. Thanks.