I had the exact same thing happen today on my Samsung Galaxy S4 running Android 4.4.4. My husband called me and could hear me talking BEFORE I answered the phone. And it's repeatable. We tried it at least 4 times and every time he could hear me (and any other sounds in the room) while the phone was actively ringing. Once I pressed the reject button, he could no longer hear me. For us, it only worked when both phones were using Wi-Fi calling. We were both on the same wi-fi network too. We plan to try this again when we are on different wi-fi networks and see if it still happens.



It's like the microphone gets turned on before the accept button is pressed. His phone is a Samsung Galaxy S3 running Android 4.3. We tried the reverse situation where I call him, but I couldn't hear him before he answered.



I know it's been several months since your post, but this is glitch is too interesting to not reply!