Yes, my screen has the same shade issue.

yes this problem is just becouse samsung software

I'm samsumg phone user from last 7 years and know its (a5 2016) is my last samsung phone i will even buy cheaper phone like mi and honner phone then samsung

i also face problem with jio sim also try 3 other jio sim but problem remains then lastly i change my jio sim with airtel but problem is still remain becouse in my mom's phone airtel speed is on an average 3 to 4mbpd but in my phone speed is just cap...

just change your old sim card with you problem will be solve i also face this problem last month