power button not able to end a call in Samsung galaxy grand prime

[AC Question]

Hi all,
i have a samsung galaxy grand prime and i need to use the power button to end the call as i talk in the phone while doing an other work.i searched many forums but couldn't find a proper answer. i can't end a call using the power button although i have enabled answering and ending calls in my mobile settings. please help

 

[anon(632115)]

I found this Grand Prime - What are the different call answer and end options on my Samsung Galaxy Grand Prime?