iphone 5: phone hot - no display
I had recently battery performance issues with my iPhone 5.
All of a sudden last week - while calling a friend - my phone turned off the display (could still talk though).
I couldn't get to work the display at all (tried the methods commonly known with pressing buttons for x seconds etc etc).
Charging it made the phone get very hot quickly. So i decided to not risk anything and bring it to a specialist for battery exchange.
This is done.. still nothing happened.
I realized though: as soon as the new battery was in (not even charged it yet), the phone got hot again.
Anyone any idea :/ ?
iPhone 5, iOS 6.1.3