I was frustrated with the problem of no sound coming during the call on Samsung Galaxy Grand Duo phone. I have tried both speaker and headphone but still not sound was coming for both incoming and outgoing call. The call was going fine but neither I can hear anything nor the other party can hear anything. There was not even dial tone, after calling it just a plop sound and call get connected but absolutely no sound at all. I have also checked all settings e.g. Call Settings, Sound Settings etc but nothing has helped. The phone was not on mute, I can hear sound from Music Player both on Speaker and Head Phone, but absolutely no sound during Call. I also checked WhatsApp call and that was working fine, which means the problem was with Call application in Samsung. Thankfully, I found a solution to my problem. Turning off the "Turn Off Screen During Call" solved this problem.