Both headphones have connected to your phones Bluetooth signal.
I could hear my cellphone over my Kali laptop speakers with Bluetooth enabled on the laptop
and
Salter EK2818 download instruction manual pdf. Not intentionally either.
I've heard other people talking over someones BT speakers as well as.
Keep the charging case in your pocket and with the earbuds in it when not in use.
To keep them from falling out of your ears, which is where I see problems, you have to stick the earbuds up into your brain.