Busy signal always comes from the external speaker

[Beavix]

Since I've upgraded to iOS 10, whenever I make a phone call and the destination number is busy, the busy signal comes from the external speaker instead of the phone speaker. This is very annoying, it's like having the speakerphone function suddenly enabled (it's NOT enabled; on a normal phone call all audio comes from the phone speaker on the top of the screen). I have an iPhone 6+. Has this been noticed by anyone else?

 

[Julien]

WOW that brings back memories. Most young people in the US won't know what you mean by "the busy signal".

 

[C DM]

Since I've upgraded to iOS 10, whenever I make a phone call and the destination number is busy, the busy signal comes from the external speaker instead of the phone speaker. This is very annoying, it's like having the speakerphone function suddenly enabled (it's NOT enabled; on a normal phone call all audio comes from the phone speaker on the top of the screen). I have an iPhone 6+. Has this been noticed by anyone else?

There was another user not long ago with essentially the same issue (it seems before iOS 10 as well) but it doesn't seem like anything was figure out about it: https://forums.macrumors.com/threads/engaged-callback-tone-through-main-speaker.1984144/