Term:Mobile internet;WiFi;3G.
In this resource I will give little idea on mobile internet, wifi, 3G.
Mobile internet-
I guess its not a specific term. Its just the ability to surf from your mobile. Ex- GPRS (slow speed). You have to get it activated from your service provider and it has various plans and charges depend on that.The service provider are Tata,Aircel,Relince,Airtel etc.3G-
Just like the GPRS. But your phone should be 3G enabled and your service provider should have 3G. Currently only BSNL has it in my opinion. Unlike GPRS 3G is very fast and can b used for watching live streaming, video conferencing etc. Again various plans and charges are available.WiFi-
See currently you have a modem and you have to connect your modem and PC with a wire to surf internet. Wifi can be thought of as technology which is used for surfing wirelessly and which are inexpensive.Many hotels use wifi internet services for their customers.
You connect your modem to a router (they are available for around 1500/-OR 2000/-). The router gets the signals through the wire and transmit it in the air. Just like the radio tower. If you are in range of those signals and have a phone or laptop which has wifi....you can catch those signals and use the internet. In-case you have a laptop the experience of surfing net would be EXACTLY the same. Only difference is you don't need wire to connect.
Since your college would be wifi enabled you just need to switch on your wifi and connect to the internet and surf!!But its not so easy. The college will provide a PIN number that's the access or key to surf internet.