I bough A71 in May 2020, its "on screen" proximity sensor was working fine. But after few days it started behaving abnormaly. Screen doesn't turn on after I put away phone from ear. And screen also keeps turning on during call. Furthermore I noticed...

When I recieve call on my A71 while phone is locked, screen doesn't gets on after call terminates.In unlocked position sensor works fine.

Signal reception is weak on my note 8.