Can any of you my friend help me I am facing a serious problem. My nexus 5 is unable to awake to screen if at all it goes off during talking on loudspeaker mode. I was travelling the other day when I was talking to my friend on loudspeaker mode and I wanted to see some contact in my phone but couldnt gain access to any of its function except I had to disconnect the call because that is the only button that works during loudspeaker mode.

Please some one help me. I have invested such huge money in buying this.