iPhone SE display stays on
I have reset it according to the on-line instructions and if I turn the phone off and back on it goes dark until I use it, then reverts to on all the time. How do I fix this?
iPhone 5s, iOS 12
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User profile for user:
green500
User level:
Community Specialist
Hello NewLondonUser,
Welcome to Apple Support Communities. We understand that your iPhone doesn’t automatically lock. We are happy to help.
We recommend trying the steps here: Keep the iPhone display on longer - Apple Support
"Change when iPhone automatically locks
You can set how long it takes iPhone to automatically lock.
Go to Settings 
> Display & Brightness > Auto-Lock, then choose a length of time."
These steps may help. Please let us know if you have further questions.
Take care.