Comment 13 for bug 1527914

This "modem key" worked out of the box for me in ubuntu 15.10.

However now, in 16.04, the "usb mode switch" is not done automatically (both is the modem is plugged at boot or after).

I suppose it's an udev regression.

So, when the "key" is plugged (lsusb):

Bus 002 Device 010: ID 12d1:1f01 Huawei Technologies Co., Ltd. E353/E3131 (Mass storage mode)

$ usb_modeswitch -J -v 0x12d1 -p 0x1f01

=> Bus 002 Device 011: ID 12d1:14dc Huawei Technologies Co., Ltd.

And now the device work as expected and can be choosed in network manager.

So there is no kernel problem for me.