any one tell me how to activate trial pack fb, wt, twitter etc

[luv]

any one tell me how to activate trial pack fb, wt, twitter etc in simple way i am trying but only one time i am able to activate

 

[sharum]

one.airtel.in/net

 

[himan82]

just go to one.airtel.in/net and click on the trial offer u want to activate....