@paul8670 well, you could always try to run the hardware test and see if that works. Dial *#0*# to get into the hardware test menu. Check your speaker and see what it does.
Next start your phone is safe mode and see if that resolve any speakers issues. If so, you know that it is a 3rd party app that may cause the issue. Here are the instructions to get into [https://www.verizon.com/support/knowledge-base-230328/|Safe Mode]
IF none of that works, use the Samsung flowchart to check it out
[image|3212619]
. Just by your symptoms, this could be a flex cable issue, or a bad sub board or speaker module.