Its very hard to get a call from top IIMs, but in case you have a good profile for eg., you awere active in college activites, hold some awards and prize in copetitions, did some courses and internship then you may get a call.

these things only hold if you have scored atleast 99.5 percentile. In CAT

Sorry to say dear Suresh you can't get a call from any IIM because the cutoff criteria for IIM is very high so I suggest you prepared for entrance exam through which you can get good colleges after that you can give CAT exam and try to get sufficient score for getting call from IIMs.

All the best Suresh