when I go to voice mail my screen turn off and can access my option

[AC Question]

when I go to voice mail my screen turn off and cannot access my option
my phone like you have 2massege press 1to listen to your massage is LG( LG-D415

 

[B. Diddy]

Welcome to Android Central! Something might be interfering with the phone's proximity sensor, such that when you call your voicemail, it thinks you have the phone up against your ear (which makes the screen turn off). Do you have a screen protector or case that might be obscuring the proximity sensor (which is usually near the front-facing camera)?