@ Saurabh Sharma

Your  E3531s is a new version,  its 3 serial interfaces should be
supported by the option.ko driver in Mint17 but the direct ethernet
interface is not, it was added to net drivers two weeks ago so will be
supported from kernel 3.17.

Please do:
cat /proc/bus/usb/devices

and verify that option driver has bound to 3 interfaces. If it has then you 
should be able to use the dongle in ppp dialup modem mode until you get an 
updated kernel with driver support for the net interface
If  option driver hasn't bound then you'll have to load it manually:

modprobe usb_wwan
modprobe option

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to usb-modeswitch in Ubuntu.
https://bugs.launchpad.net/bugs/1308895

Title:
  Please merge usb-modeswitch from Debian unstable - Huawei E3531 does
  not automatically switches to modem mode (no udev rules for this modem
  in Ubuntu's /lib/udev/rules.d)

Status in “usb-modeswitch” package in Ubuntu:
  Confirmed

Bug description:
  The operating system does not see the modem  maybe because usb-
  modeswitch not automatically switches the device mode the modem.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: usb-modeswitch 2.1.1+repack0-1ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Apr 17 11:34:11 2014
  InstallationDate: Installed on 2014-04-16 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140415)
  SourcePackage: usb-modeswitch
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1308895/+subscriptions

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