Sunlight Readability on my Lumia 640 not working

[Snooty]

My 1520 has recently passed away so I decided to pick up a 640 to hold me over until the new flagships come out. I am suprised at how beautiful the display is. Seems very sharp compared to my 1520. But the problem I seem to be noticing is regarding the sunlight readability mode. Normally with my 1520 it worked great. I would go outside and play my game and the brightness would kick up and all would be great. This phone it doesn't seem to be working at all. The auto brightness works but definitely not the sunlight mode. I did verify that it is turned on and I have tried many reboots.

What does everyone think? could it be a hardware issue?

 

[Dave47]

Please explain what you mean by "sunlight mode". There is no setting for it that I'm aware of.

 

[Archdean]

I believe he means "Sunlight readability" found in settings >display

 

[karan nakhwa1]

My 1520 has recently passed away so I decided to pick up a 640 to hold me over until the new flagships come out. I am suprised at how beautiful the display is. Seems very sharp compared to my 1520. But the problem I seem to be noticing is regarding the sunlight readability mode. Normally with my 1520 it worked great. I would go outside and play my game and the brightness would kick up and all would be great. This phone it doesn't seem to be working at all. The auto brightness works but definitely not the sunlight mode. I did verify that it is turned on and I have tried many reboots.

What does everyone think? could it be a hardware issue?

How did you fixed it?? Same m facing with lumia 1020