Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I have a Huawei E3531 3G dongle (which works fine on Ubuntu 14.04, right out of the box). However, it registers as an USB-Ethernet adapter and I can't view any signal strength or other connection information except by visiting the dongle's internal webpage at Can this dongle also be used as a ttyUSBx modem device so it works properly with network-manager?

Thanks! Florian

share|improve this question

1 Answer 1

up vote 0 down vote accepted

I can actually answer my own question now: it is possible to switch the stick into a "modem mode" where it presents 3 serial devices. Connecting via those modem devices doesn't currently work, however. In any case, here's the magic incantation - put the following into a file "/etc/usb_modeswitch.d/12d1:1f01":

# Huawei E3531s-2 - switch to modem mode instead of HiLink CDC-Ether mode

# switch to 12d1:1001 (modem mode, 3 virtual serial ports)

# switch to 12d1:14dc (default HiLink CDC-Ether mode)
# MessageContent="55534243123456780000000000000a11062000000000000100000000000000"

# switch to 12d1:1442 (debug mode with 2 virtual serial ports)
# MessageContent="55534243000000000000000000000011060000000000000000000000000000"

Found at and adapted from: http://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?f=3&t=1897

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.