It’s a common Android issue where the screen doesn’t turn on or wake up with incoming calls. The phone still keeps ringing but to check who’s calling, you will have to unlock the phone, open the dialer app and then go to the ongoing call. (हिंदी में पढ़े)
We noticed this issue on Xiaomi Mi A1 and Infinix Hot S3, both of which run Android Oreo-based software. A simple Google search reveals that a few previous generations Android phones have had the issue too, but the problem seems more prominent on Android Oreo phones like Mi A1.
Solved: Screen not turning on with incoming calls
Step 1: Go to Dialer or Phone app settings. To do so, you can either go to main settings, then open ‘Apps’, and then scroll down to Dialer or Phone App.
You can also access App Info page by long pressing the app icon, and then tapping the App info option or the small ‘i’ icon in the corner.
Step 2: Now select “App notifications” option.
Step 3: Now if App notifications are turned off, your display won’t wake up when someone calls you. Also if only the “Incoming calls” permission is off, your screen will not light up with incoming calls. Make sure required permissions are turned on and your issue will be fixed.
On Android Nougat based phones, the option is listed as Phone under permissions as is shown in the image below.
How to fix the issue of the phone display not waking up with incoming calls
The options may differ based on particular custom UI on your phone. But all you need to do is go to the App info page of the ‘Phone’ app and grant it necessary notification permissions. You probably denied the permission when first prompted and perhaps that’s the reason for why you are facing the issue.