How to test if various listed sensors of a phone are working? - Android

[sling-shot]

I have a Sony Xperia ZR which has been of late behaving erratically when on a call. I generally hold it directly against the ear (rarely use bluetooth headset never headphones). For the past 2 - 3 weeks I have been seeing that at the end of call the phone would have opened random applications, tried to change the wallpaper etc as if I some kid had been touching the screen randomly. I believe it happens because of the ear touching the screen. But I believe it should not happen as the screen and touch should automatically be switched off when near an ear. May be the proximity sensor is misbehaving?

 

[Nerevarine]

install xperia diagnostic, check things one by one
or you can just open dialer, type *#*#7378423#*#* (quickdial for SERVICE) and check from there

 

[Vyom]

Install CPU Z.
It shows all the readings of various sensors. It might help.

 

[Zangetsu]

Install CPU Z.
It shows all the readings of various sensors. It might help.

+1 for that

 

[sling-shot]

Thanks. Installed it. Initial 4 runs it showed no value for light and proximity sensors but now it is showing readings. I guess something is not right there.

 

[Nerevarine]

press *#*#7378423#*#* , go to proximity sensor, move your hand near the sensor.. If it doesnt detect, then there's something wrong

 

[sling-shot]

Ok. According to this test proximity sensor is working. Then why is the phone doing random things when on call?