Battery Drain and Touch ID failure
I have an iPhone 6 and recently I updated to iOS 9.3.3 and since then I've been facing sudden battery drain issues and Touch ID failure. A minor one and a half hour of usage causes the battery to drain to 4%. I've attached a few screenshots of the issues I'm facing.
Tried all the following steps but to no avail
1) Hard Reset (holding the Sleep/Wake button and Home button together)
2) Reset all content and setting and setting it up as a new iPhone
3) Downloaded the new .ipsw file from iTunes and performed a restore but still has the same issues.
Visited the Apple Service Center, even though my device is just 20 days out-of-warranty, they would charge me a bomb just for a check up. My phone has never had any fluid damage or any other kind of accidental damage. I don't understand the reason for this. And if it is the software update that caused my hardware failure, I think Apple is liable to replace my device free-of-cost.
Read a lot of posts on the Communities site but no solutions. A lot of people have been facing this issue. Its hard time Apple solves this issue. Some of them are here :
1) Scroll to the last page on this one. Touch ID Not Working after iOS 9.3 Update
2) Touch ID failure and Battery Drain very fast
3) Unable to set touch ID and battery draining badly. And its after iOS 9.3.1 update.
iPhone 6, iOS 9.3.3