You could see three devices for the USB modem or card, for example :

/dev/ttyUSB0
/dev/ttyUSB1
/dev/ttyUSB2

This is caused by missing bits in the hal-info package. To detect the problems, type in a terminal the output of :

lshal

Technically, only the device with

 usb.interface.number = 0

should be used by NetworkManager.

See also

• Hardware.

• HuaweiE220.

CategoryUsb CategoryNetworking