Ios 10

Hi,

i'm using a gold 6s plus. After i upgraded my phone to ios 10 i started having screen problems. Normally when i hard reset my phone, the screen turns into dark black as it shuts down. But after ios 10 when i hard reset my phone the screen sometimes turns into gray, sometimes yellow (each time weird colors).I'm having this problem for 2 days. I have restored my phone many times in 2 days,but nothing has changed. I also consulted to Apple Service but they say that it's a problem that they have never withnessed. Lastly i realized that my wife's iphone has the same problem after ios 10.

I will appreciate if anyone can find a solution.