Screen getting locked while on call

[Android Central Question]

Screen getting locked the moment a number is dialed, it doesn't up even i try to unlock by clicking home button or volume, i know this is due an option which is enabled, but unable to remember which one. There is no problem is there is a incomming call. Also no problem if headphone or earphone or connected ..

 

[B. Diddy]

Welcome to Android Central! Which phone? Do you mean that the screen goes black as soon as you make the call?