Thank you for your response. Screen is not damaged. I have removed screen protecter and disabled touch Sensitivity. I have also done factory reset but no help. Currently Only S pen is working

I too have the same thought like u. I purchased my handset in june 2016 and now its having some scratches. Thus thinking to avail screen replacement offer somewhere in April.But I m really doubting if this offer was in existent at the time of purchas...

I don't see any issue with camera, display or battery consumption after upgrading to Nougat. FYI you can put in power saving mode and even customize that. Display defaults to FHD after update. You can change it to WQHD for better quality.