my 4s sound doesn't right?
The sound on my 4s has become an awful scratchy noise. can it be fixed?
Basic troubleshooting steps can be found in the following article:
Unfortunately, a hardware problem (such as a bad solder connection involving the audio circuits) cannot be ruled out. If the device is under warranty/guarantee, contact Apple or the reseller. Otherwise, you may want to let a service provider take a look at the phone.