I don't know what happened with my installation, but since last reboot I am able to connect with 3G modem. Here's an excerpt of /var/log/syslog when I insert the device and then connect with it: Nov 8 23:38:04 scilla kernel: [ 274.210651] usb 2-1.1: new full speed USB device number 4 using ehci_hcd Nov 8 23:38:04 scilla mtp-probe: checking bus 2, device 4: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1" Nov 8 23:38:04 scilla kernel: [ 274.323221] option 2-1.1:1.0: GSM modem (1-port) converter detected Nov 8 23:38:04 scilla kernel: [ 274.323458] usb 2-1.1: GSM modem (1-port) converter now attached to ttyUSB0 Nov 8 23:38:04 scilla kernel: [ 274.323759] option 2-1.1:1.1: GSM modem (1-port) converter detected Nov 8 23:38:04 scilla kernel: [ 274.323874] usb 2-1.1: GSM modem (1-port) converter now attached to ttyUSB1 Nov 8 23:38:04 scilla kernel: [ 274.325053] scsi14 : usb-storage 2-1.1:1.2 Nov 8 23:38:04 scilla kernel: [ 274.326169] scsi15 : usb-storage 2-1.1:1.3 Nov 8 23:38:04 scilla mtp-probe: bus: 2, device: 4 was not an MTP device Nov 8 23:38:05 scilla modem-manager[935]: (ttyUSB0) opening serial port... Nov 8 23:38:05 scilla kernel: [ 275.325533] scsi 14:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 Nov 8 23:38:05 scilla kernel: [ 275.330313] scsi 15:0:0:0: Direct-Access HUAWEI MMC Storage 2.31 PQ: 0 ANSI: 2 Nov 8 23:38:06 scilla kernel: [ 275.628274] sr0: scsi-1 drive Nov 8 23:38:06 scilla kernel: [ 275.628437] sr 14:0:0:0: Attached scsi CD-ROM sr0 Nov 8 23:38:06 scilla kernel: [ 275.628529] sr 14:0:0:0: Attached scsi generic sg1 type 5 Nov 8 23:38:06 scilla kernel: [ 275.628809] sd 15:0:0:0: Attached scsi generic sg2 type 0 Nov 8 23:38:06 scilla kernel: [ 275.639033] sd 15:0:0:0: [sdb] Attached SCSI removable disk Nov 8 23:38:08 scilla modem-manager[935]: (ttyUSB0) closing serial port... Nov 8 23:38:08 scilla modem-manager[935]: (ttyUSB0) serial port closed Nov 8 23:38:08 scilla modem-manager[935]: (ttyUSB0) opening serial port... Nov 8 23:38:08 scilla modem-manager[935]: (Huawei): GSM modem /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1 claimed port ttyUSB0 Nov 8 23:38:08 scilla modem-manager[935]: (ttyUSB0) closing serial port... Nov 8 23:38:08 scilla modem-manager[935]: (ttyUSB0) serial port closed Nov 8 23:38:11 scilla modem-manager[935]: (ttyUSB1) opening serial port... Nov 8 23:38:11 scilla modem-manager[935]: (ttyUSB1) closing serial port... Nov 8 23:38:11 scilla modem-manager[935]: (ttyUSB1) serial port closed Nov 8 23:38:11 scilla modem-manager[935]: (Huawei): GSM modem /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1 claimed port ttyUSB1 Nov 8 23:38:11 scilla NetworkManager[964]: (ttyUSB0): failed to look up interface index Nov 8 23:38:11 scilla NetworkManager[964]: WWAN now disabled by management service Nov 8 23:38:11 scilla NetworkManager[964]: (ttyUSB0): new GSM/UMTS device (driver: 'option1' ifindex: 0) Nov 8 23:38:11 scilla NetworkManager[964]: (ttyUSB0): exported as /org/freedesktop/NetworkManager/Devices/3 Nov 8 23:38:11 scilla NetworkManager[964]: (ttyUSB0): now managed Nov 8 23:38:11 scilla NetworkManager[964]: (ttyUSB0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Nov 8 23:38:11 scilla NetworkManager[964]: (ttyUSB0): deactivating device (reason 'managed') [2] Nov 8 23:38:11 scilla NetworkManager[964]: nm_system_iface_flush_routes: assertion `ifindex > 0' failed Nov 8 23:38:11 scilla NetworkManager[964]: nm_system_iface_flush_addresses: assertion `ifindex > 0' failed Nov 8 23:38:11 scilla NetworkManager[964]: (ttyUSB0): device state change: unavailable -> disconnected (reason 'none') [20 30 0] Nov 8 23:38:27 scilla modem-manager[935]: (ttyUSB0) opening serial port... Nov 8 23:38:27 scilla modem-manager[935]: Modem /org/freedesktop/ModemManager/Modems/1: state changed (disabled -> enabling) Nov 8 23:38:27 scilla NetworkManager[964]: Activation (ttyUSB0) starting connection 'MegafonMsk' Nov 8 23:38:27 scilla NetworkManager[964]: (ttyUSB0): device state change: disconnected -> prepare (reason 'none') [30 40 0] Nov 8 23:38:27 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled... Nov 8 23:38:27 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started... Nov 8 23:38:27 scilla NetworkManager[964]: (ttyUSB0): device state change: prepare -> need-auth (reason 'none') [40 60 0] Nov 8 23:38:27 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete. Nov 8 23:38:27 scilla modem-manager[935]: (ttyUSB1) opening serial port... Nov 8 23:38:27 scilla modem-manager[935]: Invalid error code: 303 Nov 8 23:38:28 scilla modem-manager[935]: Modem /org/freedesktop/ModemManager/Modems/1: state changed (enabling -> enabled) Nov 8 23:38:28 scilla NetworkManager[964]: WWAN now enabled by management service Nov 8 23:38:28 scilla modem-manager[935]: Modem /org/freedesktop/ModemManager/Modems/1: state changed (enabled -> registered) Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled... Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started... Nov 8 23:38:29 scilla NetworkManager[964]: (ttyUSB0): device state change: need-auth -> prepare (reason 'none') [60 40 0] Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete. Nov 8 23:38:29 scilla modem-manager[935]: Modem /org/freedesktop/ModemManager/Modems/1: state changed (registered -> connecting) Nov 8 23:38:29 scilla modem-manager[935]: Modem /org/freedesktop/ModemManager/Modems/1: state changed (connecting -> connected) Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 2 of 5 (Device Configure) scheduled... Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 2 of 5 (Device Configure) starting... Nov 8 23:38:29 scilla NetworkManager[964]: (ttyUSB0): device state change: prepare -> config (reason 'none') [40 50 0] Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 2 of 5 (Device Configure) successful. Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 3 of 5 (IP Configure Start) scheduled. Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 2 of 5 (Device Configure) complete. Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 3 of 5 (IP Configure Start) started... Nov 8 23:38:29 scilla NetworkManager[964]: (ttyUSB0): device state change: config -> ip-config (reason 'none') [50 70 0] Nov 8 23:38:29 scilla NetworkManager[964]: starting PPP connection Nov 8 23:38:29 scilla NetworkManager[964]: pppd started with pid 3587 Nov 8 23:38:29 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 3 of 5 (IP Configure Start) complete. Nov 8 23:38:29 scilla pppd[3587]: Plugin /usr/lib/pppd/2.4.5/nm-pppd-plugin.so loaded. Nov 8 23:38:29 scilla pppd[3587]: pppd 2.4.5 started by root, uid 0 Nov 8 23:38:29 scilla pppd[3587]: Removed stale lock on ttyUSB0 (pid 2676) Nov 8 23:38:29 scilla NetworkManager[964]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0) Nov 8 23:38:29 scilla NetworkManager[964]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found. Nov 8 23:38:29 scilla pppd[3587]: Using interface ppp0 Nov 8 23:38:29 scilla pppd[3587]: Connect: ppp0 <--> /dev/ttyUSB0 Nov 8 23:38:32 scilla pppd[3587]: CHAP authentication succeeded Nov 8 23:38:32 scilla pppd[3587]: CHAP authentication succeeded Nov 8 23:38:38 scilla kernel: [ 308.025269] rtl8192c: Loading firmware file rtlwifi/rtl8192cfw.bin Nov 8 23:38:45 scilla pppd[3587]: Could not determine remote IP address: defaulting to 10.64.64.64 Nov 8 23:38:45 scilla pppd[3587]: local IP address 10.196.24.28 Nov 8 23:38:45 scilla pppd[3587]: remote IP address 10.64.64.64 Nov 8 23:38:45 scilla pppd[3587]: primary DNS address 10.77.48.19 Nov 8 23:38:45 scilla pppd[3587]: secondary DNS address 10.77.48.3 Nov 8 23:38:45 scilla NetworkManager[964]: PPP manager(IP Config Get) reply received. Nov 8 23:38:45 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 4 of 5 (IP4 Configure Get) scheduled... Nov 8 23:38:45 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 4 of 5 (IP4 Configure Get) started... Nov 8 23:38:45 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 5 of 5 (IP Configure Commit) started... Nov 8 23:38:46 scilla NetworkManager[964]: (ttyUSB0): device state change: ip-config -> activated (reason 'none') [70 100 0] Nov 8 23:38:46 scilla NetworkManager[964]: Policy set 'MegafonMsk' (ppp0) as default for IPv4 routing and DNS. Nov 8 23:38:46 scilla NetworkManager[964]: Activation (ttyUSB0) successful, device activated. Nov 8 23:38:46 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 5 of 5 (IP Configure Commit) complete. Nov 8 23:38:46 scilla NetworkManager[964]: Activation (ttyUSB0) Stage 4 of 5 (IP4 Configure Get) complete. Nov 8 23:38:46 scilla dbus[915]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper) Nov 8 23:38:46 scilla dbus[915]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Nov 8 23:38:51 scilla miredo[1129]: Reloading configuration on signal 1 (Hangup) Nov 8 23:38:51 scilla avahi-daemon[2667]: Withdrawing workstation service for teredo. Nov 8 23:38:51 scilla NetworkManager[964]: SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/teredo, iface: teredo) Nov 8 23:38:51 scilla miredo[1129]: Child 2767 exited (code: 0) Nov 8 23:38:51 scilla miredo[1129]: Starting... Nov 8 23:38:51 scilla NetworkManager[964]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/teredo, iface: teredo) Nov 8 23:38:51 scilla NetworkManager[964]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/teredo, iface: teredo): no ifupdown configuration found. Nov 8 23:39:05 scilla ntpdate[3666]: adjust time server 91.189.94.4 offset 0.025527 sec Nov 8 23:39:05 scilla miredo[3680]: No reply from Teredo server -------------------------------------------------------------------------------------------------------------------------------------------- The NM still cannot connect automatically - I have to press connect.