Crackling sound in iPhone X speaker
My iPhone X speaker is crackling - I have taken it to Verizon and they tried resetting the phone but it didn’t work. This would lead me to believe it is a hardware issue not a software operating system issue.
You might be right. Have you device inspected at an Apple Store or Authorized Service Provider. After checking it out, they'll give you all the available options:--> Apple – Location Selector
Regards
Giulio