iPhone auto brightness

[Slime]

I’m a recent convert from android and have had my iPhone for a few weeks now. What is the deal with auto brightness? It straight up does not work. If I go into settings and switch it off and back on then it auto adjusts to the environment once but then doesn’t at any time after that.

What am I missing here?

 

[Slime]

Nor I, must be a setting someplace.

Adjust the brightness and colour temperature on your iPhone or iPad – Apple Support (UK)

Adjust brightness from Control Centre or Settings.

support.apple.com

Make sure True Tone is on. I take it, it’s that that you’re flicking on and off?

Maybe something is covering the sensor at the front like a silly screen protector or case.

True Tone is on but that’s not what I was flicking on and off. There’s an auto brightness setting in accessibility>display and text size. I’m not sure what the difference is to be honest.

No screen protector and official Apple case so I don’t think it’s that.

Reassuring to know it’s probably a setting but still unsure what it could be. Maybe I’ll nip to the Apple Store tomorrow to see if I can get it sorted. It’s almost certainly something embarrassingly straight forward.

 

[Slime]

Finally got around to taking it into the Apple Store. They couldn’t definitively say what was causing this but a hard reset of the phone seems to have fixed it.

Only thing I’m still confused by is that auto-brightness disengages once I manually change the brightness which makes sense but I would expect it turn back on once I lock the screen which it doesn’t. Only way of turning it back on is to switch it off and on again.