[Resolved]  Airtel — call from a pakistani number [protected]

On Friday 30-aug-2013 around 9.00 pm i received a call from [protected]. Unknowingly i attended the call, but nobody talked, neither me nor he, after 30 to 40 second call disconnected. Today , 2-sep-2013 , 8.53 am i again received a call from the same number, unfortunately i did't see the number and pick the call but as soon as i saw the number from pakistan i cut the phone. I am worried about that , how the got my number and why they call to me. I would appreciate it if you would look into this matter, please resolved this matter. Regards.. Sharad Kumar [protected]