Please help, one of my friend shared this note ( enclosed below), I used these codes and my laptop is able open the data card but I am not getting any signals.

I am able to work with wired connection, but wi-fi and mobile broad band are not working. Please help.

sudo apt-get purge usb-modeswitch
sudo apt-get update
sudo spt-get install usb-modeswitch
sudo apt-get update
gksudo gedit /lib/udev/rules.d/40-usb_modeswitch.rules

Once you enter these above commands 40-usb_modeswitch.rules text file will open.

Then, copy below mentioned lines into 40-usb_modeswitch.rules text file.

#Huawei E1731
ATTRS{idVendor}=="12d1", ATTRS{idProduct}=="1446", RUN+="usb_modeswitch '%b/%k'"

Save the file

Then type : sudo apt-get update

Then restart the machine.