Setup Windows Phone As A Wi-Fi Hotspot
Windows Phone can be used as a Wi-Fi hotspot if needed.
Enabling this is simple and it requires two things :
A working mobile data connection and “Internet Sharing” feature enabled.
To do this :
Access Windows Phone settings and choose “mobile+SIM”.
Turn the slider to on for  “Data connection” and “3G” (if needed).
This now enables the data connection...