Step 1:
Connect your phone to your pc by USB cable and then follow steps given below.
Step 2:
Go to “Settings” of your device.
Step 3:
In the “Settings” select “Wireless and networks”.1
Step 4:
Under the “Wireless and networks” you will see “Tethering and portable hotspot” select it.
Step 5:
At last select “USB tethering” option.