Hello, I got HP Pro X2 612 G1 with 03f0:521d and unfortunately can not connect to mobile broadband (using network manager). I have tried booting Linux Mint 17.3, Fedora 23, Ubuntu 14.10 from USB stick.. Network Manager shows Mobile Broadband option ((it even shows signal strength)) after: # modprobe usbserial vendor=0x03f0 product=0x521d but I am not able to connect.. Would be thankful for any ideas/recommendations.. Good luck -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html