Just Send An sms 'SMART' (withoutquotes) to 52121 and enjoy ur 3gb net for 3months . Wait for ur confirmation msg it may take some hours . U will also get 30minutes free videocall minutes. Wait for the confirmation msg and check ur data by dialing *111*1#.
Note: insert ur sim in a gprs enabled handset before sending msg. Its working on 3G handsets.