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generic MC7455 won't connect to network

Posted: Tue Nov 30, 2021 3:24 pm
by matrx10503
Ok, have a mc7455 that was out of a BEC technologies LTE router. Generic firmware.
I've updated the card to latest f/w.
The card works in QMI mode in the BEC router fine (mbim it will not)

Put mc7455 in my rooter router and changed to mbim mode:

Code: Select all

at!gstatus?
!GSTATUS: 
Current Time:  112		Temperature: 34
Reset Counter: 2		Mode:        ONLINE         
System mode:   LTE        	PS state:    Not attached 
LTE band:      B4     		LTE bw:      20 MHz  
LTE Rx chan:   2300		LTE Tx chan: 20300
LTE CA state:  NOT ASSIGNED
EMM state:     Deregistered   	PLMN Search    
RRC state:     RRC Idle       
IMS reg state: No Srv  		

PCC RxM RSSI:  -86		RSRP (dBm):  -116
PCC RxD RSSI:  -85		RSRP (dBm):  -115
Tx Power:      --		TAC:         82F4 (33524)
RSRQ (dB):     -10.0		Cell ID:     011A3302 (18494210)
SINR (dB):     10.4
OK

Sim card and imei shows up fine. I put a EC25-AF (both qmi and mbim mode) in and it connects within 30 seconds.

Re: generic MC7455 won't connect to network

Posted: Sun Dec 05, 2021 5:01 pm
by packlet
Is the SIM/plan tied to a specific IMEI, perhaps?

Re: generic MC7455 won't connect to network

Posted: Sun Dec 05, 2021 6:12 pm
by matrx10503
I put another carrier sim and it worked, then I swapped the tmo back in and was working this time. So i'm not exactly sure what ended up getting it to work.