I'd like to recommend creating a account so me or other members can assist you, as guest have limitations in replying here and if we need further Information to communicate with you.
I suggest you contact whoever did the screen replacement and ask them to redo it - properly this time. There are pieces put into the phone that look as if they have no purpose - but they're to prevent echo. (Some not-too-experienced "repair people" just leave them out. Like paper covers over non-conducting [but sound reflective] plastic.)