4G (PPP) - Not working after update from 18.7

[MarvinParanoidAndroid]

Hi!

So I got a Huawei E3372 connected but I can't get it to work after updating from 18.7.

Error in dashbord is: "4G - None, No Service Mode".

When setting it up on 18.7 I used CU to determine what modem port to use (cuaU0.0) and get correct reply when verifying that SIM card does not have PIN enabled (I have screenshots of this).

On 19.7 I ran CU again and now I only get "OK" and "READY" responses from cuaU0.1(!).

I've tried both for connection and I get the following error responses in Point-to-point -> Log File:

cuaU0.0: ppp: [opt2_link0] CHAT: The modem responded with "ERROR" to the command "AT&F&C1&D2E0S0=0M1" at ModemCmd: label.

cuaU0.1: ppp: [opt2_link0] CHAT: The modem is not responding to any ATI[1,3-5,8] commands.

I've done some googling and also tested different Init string to no avail.

I would greatly appreciate any help with resolving this issue.

Cheers
-- Paranoid Android

[orzechszek]

Hi,

I have the same issue with the same modem on 19.7.3.
It responses properly on commands:

root@OPNsense:~ # cu -l /dev/cuaU0.1
Connected
+CFUN: 1
OK
+CPIN: READY

but it doesn't connect
About modem:

Manufacturer: huawei
Model: E3372
Revision: 21.200.07.00.805
IMEI: 86***
+GCAP: +CGSM,+DS,+ES

[orzechszek]

I started digging manually with commands and I've noticed interesting behavior:
- first I've disabled interface with modem to unlock cuaU0.1
- run command cu -l /dev/cuaU0.1
- run command: AT+CGACT=1,1
and then a light on modem stop blinking and start shining.
Unfortunately I don't know how to check if it's really connected.