Hi, Xingxing and I am trying to get the Huawei MS2131 working. After swapping mdm with pcui interface, oFono starts to talk to the device. --- a/plugins/udevng.c +++ b/plugins/udevng.c @@ -332,14 +332,14 @@ static gboolean setup_huawei(struct modem_info *modem) g_strcmp0(info->interface, "255/2/1") == 0 || g_strcmp0(info->interface, "255/3/1") == 0 || g_strcmp0(info->interface, "255/1/49") == 0) { - mdm = info->devnode; + pcui = info->devnode; } else if (g_strcmp0(info->label, "pcui") == 0 || g_strcmp0(info->interface, "255/1/2") == 0 || g_strcmp0(info->interface, "255/2/2") == 0 || g_strcmp0(info->interface, "255/2/18") == 0 || g_strcmp0(info->interface, "255/3/18") == 0 || g_strcmp0(info->interface, "255/1/50") == 0) { - pcui = info->devnode; + mdm = info->devnode; } else if (g_strcmp0(info->label, "diag") == 0 || g_strcmp0(info->interface, "255/1/3") == 0 || g_strcmp0(info->interface, "255/2/3") == 0 || A enable-modem and online-modem later oFono gets stuck at netreg searching for a network. So to check if the modem and the SIM are working we played with wvdial: root@iot2000-ebs:/etc# wvdial MS2131 --> WvDial: Internet dialer version 1.61 --> Initializing modem. --> Sending: AT^NDISDUP=1,1 AT^NDISDUP=1,1 OK --> Sending: AT+CGDCONT=1,"IP","web.vodafone.de" AT+CGDCONT=1,"IP","web.vodafone.de" OK --> Modem initialized. --> Configuration does not specify a valid phone number. root@iot2000-ebs:/etc# ifup wwan0 udhcpc (v1.24.1) started Sending discover... Sending select for 100.92.86.33... Lease of 100.92.86.33 obtained, lease time 518400 /etc/udhcpc.d/50default: Adding DNS 139.7.30.126 /etc/udhcpc.d/50default: Adding DNS 139.7.30.125 Stupid mode: root@iot2000-ebs:/etc# wvdial MSSS --> WvDial: Internet dialer version 1.61 --> Initializing modem. --> Sending: ATZ ATZ OK --> Sending: AT+CGDCONT=1,"IP","web.vodafone.de" AT+CGDCONT=1,"IP","web.vodafone.de" OK --> Modem initialized. --> Sending: ATDT*99***1# --> Waiting for carrier. ATDT*99***1# CONNECT 21600000 --> Carrier detected. Starting PPP immediately. --> Starting pppd at Thu Jan 18 08:51:33 2018 --> Pid of pppd: 942 PPP generic driver version 2.4.2 --> pppd: ▒e[07][08] --> Using interface ppp0 --> pppd: ▒e[07][08] --> pppd: ▒e[07][08] --> pppd: ▒e[07][08] --> pppd: ▒e[07][08] PPP BSD Compression module registered PPP Deflate Compression module registered --> pppd: ▒e[07][08] --> local IP address 100.68.88.182 --> pppd: ▒e[07][08] --> remote IP address 10.64.64.64 --> pppd: ▒e[07][08] --> primary DNS address 139.7.30.126 --> pppd: ▒e[07][08] --> secondary DNS address 139.7.30.125 --> pppd: ▒e[07][08] ^CCaught signal 2: Attempting to exit gracefully... --> Terminating on signal 15 --> pppd: ▒e[07][08] --> Connect time 5.4 minutes. --> pppd: ▒e[07][08] --> pppd: ▒e[07][08] --> pppd: ▒e[07][08] --> Disconnecting at Thu Jan 18 08:56:56 2018 Without stupid mode: root@iot2000-ebs:/etc# wvdial MSSS --> WvDial: Internet dialer version 1.61 --> Initializing modem. --> Sending: ATZ ATZ OK --> Sending: AT+CGDCONT=1,"IP","web.vodafone.de" AT+CGDCONT=1,"IP","web.vodafone.de" OK --> Modem initialized. --> Sending: ATDT*99***1# --> Waiting for carrier. ATDT*99***1# CONNECT 21600000 --> Carrier detected. Waiting for prompt. --> Don't know what to do! Starting pppd and hoping for the best. --> Starting pppd at Thu Jan 18 08:57:52 2018 --> Pid of pppd: 1021 --> pppd: �e[07][08] --> Using interface ppp0 --> pppd: �e[07][08] --> pppd: �e[07][08] --> pppd: �e[07][08] --> pppd: �e[07][08] --> pppd: �e[07][08] --> local IP address 100.68.122.98 --> pppd: �e[07][08] --> remote IP address 10.64.64.64 --> pppd: �e[07][08] --> primary DNS address 139.7.30.126 --> pppd: �e[07][08] --> secondary DNS address 139.7.30.125 --> pppd: �e[07][08] As you can see, when the netreg is just ignored and start with pppd we get a connnection. Just dumping the debug state. Mabye someone has some input on this. Thanks, Daniel