I had same problem, My Lumia 820 started with a faint shadow of blue on the right hand side & morning completely goes in black.I submit my phone at their Service center and they told me that they have send my Lumia 820 in factory for repair.
I had same problem, My Lumia 820 started with a faint shadow of blue on the right hand side & morning completely goes in black.I submit my phone at their Service center and they told me that they have send my Lumia 820 in factory for repair.