First of all u need one AIRCEL SIM and 3G enabled Phone.Then Buy any Pocket Internet Recharge Card Worth of 14rs or 27rs whatever the price may be in your city.Remember do not Easy recharge on ur mobile number.Then recharge your mobile with that Card!After one hour send a Message to "121" as "START 3G"!After Two Hours the 3G services will be active in ur mobile.Here Comes the AIRCEL 3G HACK trick......
Connect ur mobile to PC or Laptop with the 2G signal......

Go to Settings --> Phone --> Network Mode --> GSM !!!

After that Browse the internet for 10 min. or so...

Now change the Network Mode to "UMTS" ,3Gmode or "DUAL MODE"......

Thats it! U can Enjoy 3G services(Only INTERNET) with broadband Speed!!!

Those who already Activated 3G services can also Enjoy these services by simply messaging "STOP 3G" to "121" !!!
After one Hour your 3G services will be De-Activated!!!
After that u can Proceed with the Above Steps..........
Enjoy Unlimited Downloads with AIRCEL 3G!!!
Explore Unlimited Possibilities with AIRCEL.....