Do you still need help with this? Were you able to figure out what was going on?
It would out help the Community if you let us know if FidoPamela's suggestion helped!
Let us know!
Welcome to the Community
Not sure what you mean there. Are you getting a buzzing sound when you're making/receiving calls on 4G or is it when you use your phone no matter what you do?
Have you tried to restart/reset your phone since this started happening?