AMIT PATEL — issue of battery

Address: Mehsana, Gujarat

I have bought redmi-2 15 DAYS before a month. It was working properly but from last few days the battery drain out very quickly even if phone is idle. Once I have heard humming noise coming out of my phone when i was using wifi. Solve my issue of battery.. please reply my email adress is : [protected]@gmail.com mo no : [protected]