So the ios9 has been out for a while and we all know about the bug where in while you're on a facetime call it will break off sometimes, when you're wearing earbuds, and audio routing will be messed up in general. After talking to quite a few friends I think I know what the establishing factor is. If I could have everyone post the following things below i'd appreciate it. let's see if I can confirm my suspicion.
1. carier where you bought your phone (or store where you bought your phone)
2. country of origin of your phone (where you bought it)
3. iPhone model
4. do you have the audio routing bug or not?