Thanks for the reply .
Tried everything you insisted but the problem doesn't still continues . Apple store guys told me to use it as it is because lot of other people came with same complaint nothing can be done until an update comes to resolve the issue. when asked about the update they told they don't have any idea ,it might come in an hour, a day , a month or an year.
I wonder what is the value for money in buying an apple product besides it is one of the costliest brand and the service is not even to the mark that can be spoken about.
why no one is addressing the issue the online forums are flooded with the battery draining issue, god why did I buy this phone