EC25-AF does not connect to LTE

[LongNoseE]

Hi All,

I recently ordered some EC25AFs (Revision EC25AFFAR07A14M4G). Unlike the EC25AFs I have previously used on this device (Mobile DVR) it does not seem to connect to LTE. I am very much a novice at this and have no idea where to start. I have a working EC25AF (EC25AFFAR07A08M4G) can pull settings from this one if possible. I have a T-Mobile sim card and a AT&T sim card (Unsure if this one is active yet) for testing. Is there anything I can try changing to get this up and running?

Thank you in advance.

[Didneywhorl]

Prob be best to flash the new ones with the same firmware image on the old one. Or you may need to ensure the settings are the same between them. The newer firmware shouldn't have nay new settings, just updated protocols and potential bug fixes.

I would check:

AT+QCFG="NWSCANMODE"

AT+QMBNCFG="AutoSel"

AT+QMBNCFG="List" (Outputs a profile list. You're looking for the possible activated profile .. the active one starts with its number then a 1,1 .. like 0,1,1,....., the rest are 1,0,0 ... 2,0,0 ... 3,0,0 ...)

AT+QCFG="USBNET"

Those settings are the core of what should match between the units.

[LongNoseE]

Thank you, I will check this right now!
Working EC25AF (EC25AFFAR07A08M4G)

Code: Select all

AT+QCFG="NWSCANMODE"
+QCFG: "nwscanmode",0

OK

AT+QMBNCFG="AutoSel"
+QMBNCFG: "AutoSel",1

OK

AT+QMBNCFG="List"
+QMBNCFG: "List",0,0,0,"ROW_Generic_3GPP",0x0501081F,201901141
+QMBNCFG: "List",1,0,0,"VoLTE-ATT",0x0501033C,201905161
+QMBNCFG: "List",2,0,0,"hVoLTE-Verizon",0x05010141,201907121
+QMBNCFG: "List",3,1,1,"Commercial-TMO_VoLTE",0x05010505,201811231

OK

AT+QCFG="USBNET"
+QCFG: "usbnet",0

OK

Non Working EC25AF (EC25AFFAR07A14M4G)

Code: Select all

AT+QCFG="NWSCANMODE"
+QCFG: "nwscanmode",0

OK

AT+QMBNCFG="AutoSel"
+QMBNCFG: "AutoSel",1

OK

AT+QMBNCFG="List"
+QMBNCFG: "List",0,0,0,"ROW_Generic_3GPP",0x0501081F,202112292
+QMBNCFG: "List",1,0,0,"VoLTE-ATT",0x0501033C,202203251
+QMBNCFG: "List",2,0,0,"hVoLTE-Verizon",0x05010141,202111151
+QMBNCFG: "List",3,1,1,"Commercial-TMO_VoLTE",0x05010505,202202211
+QMBNCFG: "List",4,0,0,"Commercial-Rogers",0x05018821,202202091
+QMBNCFG: "List",5,0,0,"Telus-Commercial_VoLTE",0x05800C43,202105061
+QMBNCFG: "List",6,0,0,"TF_Germany_VoLTE",0x05010C1B,202004151
+QMBNCFG: "List",7,0,0,"TF_Spain_VoLTE",0x05010CFA,202203241
+QMBNCFG: "List",8,0,0,"Telus-Consumer_VoLTE",0x0580F801,202105061
+QMBNCFG: "List",9,0,0,"Commercial-USCC",0x0504FC40,202203021

OK

AT+QCFG="USBNET"
+QCFG: "usbnet",0

OK

The only thing that seems to be different on these two models is the amount of items in the list. T-Mobile seems to be active with both though. Going to try flashing the EC25AFFAR07A08M4G firmware onto the newer modem.

Another noob question, how do I go about saving settings to the modem?

[Didneywhorl]

The modem settings save automatically. You can make sure by running AT+QPRTPARA=1

You only need to run that once though, never needed again. IT just says, 'Hey make sure to always save settings to backup memeoy' .. basically.

[LongNoseE]

Figured out the problem. Quectel put out a new protocol for their modems and the mobile DVR we use didn't have the correct firmware to compensate for it. Got a firmware update from the company and we're back in business. Thanks for the help!