Thanks for your response with pictures. It showed me that I had missed transferring the ear piece casing from the old screen to the new screen. Now I can hear the other party during a call without turning on the speaker phone. I had followed a number of YouTube videos, but none of them showed the ear piece casing. I guess there are variations of the LG-5 phones. Incidentally, I also had to transfer two pieces of rubber spacers from either side of the ear piece speaker from the old screen to the new screen to make the camera flash light and the proximity sensor work. Without that I was getting the phone screen to go blank during a call.
I hope you can help me with another issue that I came across when I first opened the phone to replace the broken screen. I found a black U-shaped piece made of hard plastic lying loose inside the case. I cannot for the life of me find out where it comes from. Hopefully, you can help me identify it and its location. I am attaching a picture
Thanks for your help