I already update to the new iOS but the hissing sound still there when I'm on the phone. So I must use speaker to hear more clearly when I was in a call. How can I fix this?
Posted on Oct 20, 2016 7:43 PM
Q: Hissing sound
We cannot help in this venue with what appears to be a hardware issue
Take it to service
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https://locate.apple.com/
