Wi-fi hotspot device are increasing providing internet access when we are on the go, through this process we can easily share internet to another device without any object. The volume of supporting device quantity depends as par the manufacturing company & device configuration. A portable wi-fi hotspot device work as an internet source which as connect many device through wi-fi , & share one internet connection to other gadgets .
Most of the android handset support wi-fi hotspot option. Just enable internet in your sim card or device and share it through wi-fi hotspot, but actually the internet source is sim card. For better result activate 3g then share your internet connection .you can configure or change the internet sharing option , like wpa, wpa2,wpa2-psk
Simbased:-sum wi-fi hotspot device or router available in market. In this type of device you need to a sim card from internet service provider, & put it into wi-fi router, then connect with pc or laptop through usb data cable. For share just go to settings & enable internet sharing option.
Data card with wi-fi hotspot :- some of internet service provider are provide data card with wi-fi hotspot enable features. You can use it as a modem through usb connection and share the same internet through wi-fi hotspot option.