I love customization.Recently I downloaded substratum theme..Does it cause any harm to device and performance?

I am a huge fan of samsung galaxy note 8...presently I am using itAt present so many brands are updating to oreo. Recently one plus 3 and nokia 8 also got their updates...but why our lovely brand samsung is taking huge time for updateplease I am requ...

guys... i like note 8 so much....but it is hanging so much...just now i restarted my mobile.....yes now it works good...but my impression on this note 8 little bit bad...pls fix this

why don't you add some more themes and make our note 8 looks amazing....just now i installed nova launcher with pixel icons...its absolutely amazing but i hate to use third party appd on my note 8.....please improve this...and there is a lot of space...