Me too. 

Ubuntu remix 9.04 sur mon eeePC 901, Icon225 USB modem for Mobistar Belgium. 

Daemon.log

Apr 24 17:06:49 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) starting connection 'Mobistar (personal)' 
Apr 24 17:06:49 aliokan-laptop NetworkManager: <info>  (ttyHS0): device state change: 3 -> 4 
Apr 24 17:06:49 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 1 of 5 (Device Prepare) scheduled... 
Apr 24 17:06:49 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 1 of 5 (Device Prepare) started... 
Apr 24 17:06:49 aliokan-laptop NetworkManager: <debug> [1240585609.942392] nm_serial_device_open(): (ttyHS0) opening device... 
Apr 24 17:06:49 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 1 of 5 (Device Prepare) complete. 
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  (ttyHS0): powering up... 
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  Registered on Home network 
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  Associated with network: +COPS: 0,0,"Mobistar",2 
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 2 of 5 (Device Configure) scheduled...
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 2 of 5 (Device Configure) starting... 
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  (ttyHS0): device state change: 4 -> 5 
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  (ttyHS0): device state change: 5 -> 6 
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 2 of 5 (Device Configure) complete. 
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 2 of 5 (Device Configure) scheduled...
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 2 of 5 (Device Configure) starting... 
Apr 24 17:06:50 aliokan-laptop NetworkManager: <info>  (ttyHS0): device state change: 6 -> 5 
Apr 24 17:06:51 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 2 of 5 (Device Configure) complete. 
Apr 24 17:06:51 aliokan-laptop NetworkManager: <info>  Authentication successful! 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  Connected, Woo! 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 3 of 5 (IP Configure Start) scheduled. 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 3 of 5 (IP Configure Start) started... 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  (ttyHS0): device state change: 5 -> 7 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 3 of 5 (IP Configure Start) complete. 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 4 of 5 (IP Configure Timeout) scheduled... 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 4 of 5 (IP Configure Timeout) started... 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  (ttyHS0): device state change: 7 -> 9 
AApr 24 17:06:49 aliokan-laptop NetworkManager: <debug> [1240585609.942392] nm_serial_device_open(): (ttyHS0) opening device... 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <debug> [1240585618.474482] nm_serial_device_close(): Closing device 'ttyHS0' 
pr 24 17:06:58 aliokan-laptop NetworkManager: <debug> [1240585618.474482] nm_serial_device_close(): Closing device 'ttyHS0' 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  Marking connection 'Mobistar (personal)' invalid. 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) failed. 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  Activation (ttyHS0) Stage 4 of 5 (IP Configure Timeout) complete. 
Apr 24 17:06:58 aliokan-laptop NetworkManager: <info>  (ttyHS0): device state change: 9 -> 3