Comment 13 for bug 509738

NM debug output:

NetworkManager: <info> Activation (ttyUSB2) starting connection 'LVM-Mobil'
NetworkManager: <info> (ttyUSB2): device state change: 3 -> 4 (reason 0)
NetworkManager: <info> Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) scheduled...
NetworkManager: <info> Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) started...
NetworkManager: <info> Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) complete.
NetworkManager: <info> (ttyUSB2): device state change: 4 -> 3 (reason 0)
NetworkManager: <info> (ttyUSB2): deactivating device (reason: 0).
NetworkManager: <info> Policy set 'Auto mosquito' (wlan0) as default for routing and DNS.
NetworkManager: <WARN> stage1_enable_done(): GSM modem enable failed: (32) SIM PIN required
NetworkManager: <info> (ttyUSB2): device state change: 3 -> 9 (reason 0)
NetworkManager: <info> Activation (ttyUSB2) failed.
NetworkManager: <info> (ttyUSB2): device state change: 9 -> 3 (reason 0)
NetworkManager: <info> (ttyUSB2): deactivating device (reason: 0).
NetworkManager: <info> Policy set 'Auto mosquito' (wlan0) as default for routing and DNS.