Calls coming through headphones when phone is on silent
Hi, I live in a very noisy area and use sleep headphones (the ones where there are flat speakers inside a headband) and play gentle music throughout the night to help me sleep. Sometimes also during the day as I have a chronic illness.
My issue is that even when I put the phone on silent, calls still ring through the headphones, waking me up. Is there a way I can stop this?
Thank you
PS I have an iPhone 6S on iOS 11.2.5