Help!!! samsung galaxy note 2

[Mr karki]

my phone works properly it's don't have problem
suddenly i'm calling on hands free mode it's gonna blank.
but all buttons and touch is working.
i can receive the call. but can't see how's calling and nothing?
its blank.....
please help me out of this.

sorry for bad english

 

[B. Diddy]

Welcome to Android Central! If you turn off hands free mode, does the screen come back on?

 

[Mr karki]

actually i'm calling to some one that time i switch to loud speaker mode
suddenly screen gone blank but phone still working even now,
but no screen light nothing appears
i can't do anything except receiving call... like we always receive a call in a black screen.

 

[B. Diddy]

See if it happens in Safe Mode: https://support.t-mobile.com/docs/DOC-11474