Mobile Recharge Scam goes in two ways:
You get a call from Jharkhand etc number which can be Airtel or Vodafone etc, they ask you ATM pin. Then they recharge their mobile from your bank account in Rs. 5000-10,000 each time.
My brother was both lucky and unlucky. He was unlucky since before he could change his PIN Rs. 25000 was already withdrawn.
He was lucky as he rushed to ATM machine and cancelled his card promptly as there was Rs. 1.5 lacs in his account