Before disable any features or removing covers to acces screen or internal parts!
I'll try first heating the screen with an electronics heat gun, or a hair blow dryer with a back and forth motion along the frame and screen at the same time press in the corner. This is on right the opposite of headphones Jack's is where the proximity sensor is located.
use a napkin or a rag to press down the screen because the phone will be hot!
The whole idea is to melt the black adhesive used to keep the screen together to the frame and bring the screen to its proper level. This is where the issue lies to the proximity sensor acting faulty
Once phone is hot also face it down and use light pressure to the sourounding Edge! And keep the pressure till it cools down for about 3-4 min
Do this on shut down device
Turn on the phone and then do a test by dialing *#*#7378423#*#*
"Hit proximity switch" and should read off by default! Put a finger but don't touch the screen, on the right corner and should turn on, remove finger, should turn off this indication it was successfully fix!
Note this fix is the phone actually has the black adhesive used around the edge when your screen was previously replaced. Some technicians might of not used the black adhesive and used double sided tape to keep screen together. The double sided tape could also bring problems down the line because of dust particles getting in between the edge and adhesive not sticking on the screen and causing the screen to lift up from the frame
In this case you would have dis assemble the whole phone to get to screen and clean around the edge and install proper adhesive and fallow the above steps!
I did this and it help me, I hope it does it for you!
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