собственно есть 3g модем от мегафон e1550, настраиваю поключение - задаю номер *99***1# и APN fixed.mcu
модем система видит
root@debian:/var/log# lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 12d1:1001 Huawei Technologies Co., Ltd. E169/E620/E800 HSDPA Modem
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
пытаюсь подключится через kde NM
Dec 19 14:35:04 debian NetworkManager[1532]: <info> (ttyUSB0): device state change: 3 -> 4 (reason 0)
Dec 19 14:35:04 debian NetworkManager[1532]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled...
Dec 19 14:35:04 debian NetworkManager[1532]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started...
Dec 19 14:35:04 debian NetworkManager[1532]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete.
Dec 19 14:35:04 debian modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (registered -> connecting)
Dec 19 14:35:04 debian modem-manager: Got failure code 100: Unknown error
Dec 19 14:35:04 debian modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (connecting -> registered)
Dec 19 14:35:04 debian NetworkManager[1532]: <warn> GSM connection failed: (32) No cause information available
Dec 19 14:35:04 debian NetworkManager[1532]: <info> (ttyUSB0): device state change: 4 -> 9 (reason 1)
Dec 19 14:35:04 debian NetworkManager[1532]: <info> Marking connection 'megafon3g' invalid.
Dec 19 14:35:04 debian NetworkManager[1532]: <warn> Activation (ttyUSB0) failed.
Dec 19 14:35:04 debian NetworkManager[1532]: <info> (ttyUSB0): device state change: 9 -> 3 (reason 0)
Dec 19 14:35:04 debian NetworkManager[1532]: <info> (ttyUSB0): deactivating device (reason: 0).
