i tried to use my Nokia N900 to connect to the internet but didn't get a connection. I use ModemManager from trunk (commit 592d71ff76318b6389f6866d5394a844c7e35513).
** Message: ModemManager (version 0.4) starting...
** Message: Loaded plugin Generic
** Message: Loaded plugin Option
** Message: Loaded plugin AnyData
** Message: Loaded plugin Sierra
** Message: Loaded plugin SimTech
** Message: Loaded plugin Gobi
** Message: Loaded plugin Ericsson MBM
** Message: Loaded plugin Linktop
** Message: Loaded plugin X22X
** Message: Loaded plugin Huawei
** Message: Loaded plugin Longcheer
** Message: Loaded plugin ZTE
** Message: Loaded plugin MotoC
** Message: Loaded plugin Nokia
** Message: Loaded plugin Option High-Speed
** Message: Loaded plugin Novatel
** (modem-manager:4865): DEBUG: <1292054027.432050> (ttyACM0) opening serial port...
** (modem-manager:4865): DEBUG: <1292054027.432690> (ttyACM0) device open count is 1 (open)
** (modem-manager:4865): DEBUG: (ttyACM0): probe requested by plugin 'Nokia'
** (modem-manager:4865): DEBUG: <1292054027.532868> (ttyACM0): --> 'AT+GCAP<CR>'
** (modem-manager:4865): DEBUG: <1292054028.334135> (ttyACM0): <-- 'T+GCAP<CR><CR><LF>+GCAP: +CGSM,+DS,+W<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.334428> (ttyACM0) device open count is 0 (close)
** (modem-manager:4865): DEBUG: <1292054028.334481> (ttyACM0) closing serial port...
** (modem-manager:4865): DEBUG: <1292054028.337013> (ttyACM0) serial port closed
** Message: (ttyACM0) type primary claimed by /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2
** (modem-manager:4865): DEBUG: <1292054028.340721> (ttyACM0) opening serial port...
** (modem-manager:4865): DEBUG: <1292054028.341171> (ttyACM0) device open count is 1 (open)
** (modem-manager:4865): DEBUG: <1292054028.341276> (ttyACM0) device open count is 2 (open)
** (modem-manager:4865): DEBUG: <1292054028.341336> (ttyACM0) device open count is 3 (open)
(modem-manager:4865): GLib-GObject-WARNING **: g_object_set_valist: object class `MMAtSerialPort' has no property named `'
** Message: (Nokia): GSM modem /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2 claimed port ttyACM0
** (modem-manager:4865): DEBUG: Added modem /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2
** (modem-manager:4865): DEBUG: (tty/ttyACM0): outstanding support task prevents export of /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2
** (modem-manager:4865): DEBUG: <1292054028.341843> (ttyACM0): --> 'ATE0<CR>'
** (modem-manager:4865): DEBUG: <1292054028.607388> (ttyACM0): <-- 'E0<CR><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.607621> (ttyACM0): --> 'AT+GMI<CR>'
** (modem-manager:4865): DEBUG: <1292054028.647291> (ttyACM0): <-- '<CR><LF>Nokia<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.647467> (ttyACM0): --> 'AT+GMM<CR>'
** (modem-manager:4865): DEBUG: <1292054028.687799> (ttyACM0): <-- '<CR><LF>Nokia N900<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.687883> (ttyACM0): --> 'AT+GMR<CR>'
** (modem-manager:4865): DEBUG: <1292054028.727527> (ttyACM0): <-- '<CR><LF>V ICPR82_10w08<CR><LF>25-02-10<CR><LF>RX-51<CR><LF>(c) Nokia<CR><LF><CR><LF>Nokia N900 (RX-51 rev 2104)<CR><LF>Maemo 5 (20.2010.36.2)<CR><LF>Linux version 2.6.28-omap1<CR><LF>Product 0574383A<CR><LF><CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.727749> (ttyACM0): --> 'AT+CGMI<CR>'
** (modem-manager:4865): DEBUG: <1292054028.768966> (ttyACM0): <-- '<CR><LF>Nokia<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.769058> (ttyACM0): --> 'AT+CGMM<CR>'
** (modem-manager:4865): DEBUG: <1292054028.809870> (ttyACM0): <-- '<CR><LF>Nokia N900<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.809934> (ttyACM0): --> 'AT+CGMR<CR>'
** (modem-manager:4865): DEBUG: <1292054028.850744> (ttyACM0): <-- '<CR><LF>V ICPR82_10w08<CR><LF>25-02-10<CR><LF>RX-51<CR><LF>(c) Nokia<CR><LF><CR><LF>Nokia N900 (RX-51 rev 2104)<CR><LF>Maemo 5 (20.2010.36.2)<CR><LF>Linux version 2.6.28-omap1<CR><LF>Product 0574383A<CR><LF><CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.850857> (ttyACM0): --> 'ATI<CR>'
** (modem-manager:4865): DEBUG: <1292054028.871540> (ttyACM0): <-- '<CR><LF>Nokia<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.871705> (ttyACM0): --> 'ATI1<CR>'
** (modem-manager:4865): DEBUG: <1292054028.900203> (ttyACM0): <-- '<CR><LF>356938034044959<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.900365> (ttyACM0): --> 'AT+GSN<CR>'
** (modem-manager:4865): DEBUG: <1292054028.939750> (ttyACM0): <-- '<CR><LF>356938034044959<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054028.939839> (ttyACM0): --> 'AT+CGSN<CR>'
** (modem-manager:4865): DEBUG: <1292054028.980587> (ttyACM0): <-- '<CR><LF>356938034044959<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: Device ID source '00000421000001c8Nokia356938034044959356938034044959VICPR82_10w0825-02-10RX-51(c)NokiaNokiaN900(RX-51rev2104)Maemo5(20.2010.36.2)Linuxversion2.6.28-omap1Product0574383ANokiaN900Nokia'
** (modem-manager:4865): DEBUG: Device ID '408eca70d687066d56b841d3ca6517a3dc5896f2'
** (modem-manager:4865): DEBUG: <1292054028.980811> (ttyACM0) device open count is 2 (close)
** (modem-manager:4865): DEBUG: <1292054028.980841> (ttyACM0): --> 'ATE0<CR>'
** (modem-manager:4865): DEBUG: <1292054029.7602> (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054029.7863> (ttyACM0) device open count is 1 (close)
** (modem-manager:4865): DEBUG: <1292054029.7918> (ttyACM0): --> 'AT+CPIN?<CR>'
** (modem-manager:4865): DEBUG: <1292054029.56026> (ttyACM0): <-- '<CR><LF>+CPIN: READY<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4865): DEBUG: <1292054029.56186> (ttyACM0) device open count is 2 (open)
** (modem-manager:4865): DEBUG: <1292054029.56251> (ttyACM0) device open count is 1 (close)
** (modem-manager:4865): DEBUG: <1292054029.56320> (ttyACM0): --> 'AT+CRSM=176,12258,0,0,10<CR>'
** (modem-manager:4865): DEBUG: <1292054029.187879> (ttyACM0): <-- '<CR><LF>ERROR<CR><LF>'
** (modem-manager:4865): DEBUG: Got failure code 100: Unknown error
** (modem-manager:4865): DEBUG: <1292054029.188054> (ttyACM0) device open count is 0 (close)
** (modem-manager:4865): DEBUG: <1292054029.188096> (ttyACM0) closing serial port...
** (modem-manager:4865): DEBUG: <1292054029.190580> (ttyACM0) serial port closed
** (modem-manager:4865): DEBUG: Exported modem /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2 as /org/freedesktop/ModemManager/Modems/0
** (modem-manager:4865): DEBUG: (/org/freedesktop/ModemManager/Modems/0): VID 0x0421 PID 0x01C8 (usb)
** (modem-manager:4865): DEBUG: (/org/freedesktop/ModemManager/Modems/0): data port is ttyACM0
** (modem-manager:4865): DEBUG: <1292054035.997340> (ttyACM0) opening serial port...
** (modem-manager:4865): DEBUG: <1292054035.997890> (ttyACM0) device open count is 1 (open)
** (modem-manager:4865): DEBUG: <1292054035.997931> Modem /org/freedesktop/ModemManager/Modems/0: state changed (disabled -> enabling)
** (modem-manager:4865): DEBUG: <1292054036.98879> (ttyACM0): --> 'ATZ E0 V1<CR>'
** (modem-manager:4865): DEBUG: <1292054036.369784> (ttyACM0): <-- 'TZ E0 V1<CR>'
** (modem-manager:4865): DEBUG: <1292054039.2661> Modem /org/freedesktop/ModemManager/Modems/0: state changed (enabling -> disabled)
** (modem-manager:4865): DEBUG: <1292054039.2709> (ttyACM0) device open count is 0 (close)
** (modem-manager:4865): DEBUG: <1292054039.2731> (ttyACM0) closing serial port...
** (modem-manager:4865): DEBUG: <1292054039.5153> (ttyACM0) serial port closed
