HTC one screen doesn't get locked after screen timeout

[AC Question]

Recently I had installed fakeGPS from Play Store, but I removed it after few hours. Then I realize my phone doesn't lock screen after timeout interval. I think fakeGPS app did something to m phone, but I dont see any suspicious app on my phone.

Anyone know how to fix this ?

Phone Model : HTC One M7 (ATT)
Android : 5.0.2

 

[B. Diddy]

Welcome to Android Central! Go to Settings>Security>Lock Phone After, and make sure it's set to the desired interval. If it looks like it's set up correctly but the phone still isn't behaving correctly, then go to Settings>Security>Device Administrators, and see if there are any unusual apps (besides Android Device Manager) listed there.