I have the Nokia Lumia 620 wp8 phone and I've recently bought a bluetooth headset(nokia bh-100). The problem is that when I am receiving a call now, after 3 seconds the phone stops ringing and passes the ringing to the headphone. That way I have missed quite some calls because I did not heard the 3 sec ringing. Any ideas on how to fix that? Thank you.
If for some reason turning off the headset is impractical or undesirable, you can also just turn off the Bluetooth on the phone (though that will disconnect all BT devices, not just headsets but also things like fitness watches and such, until you turn it on again). I have Bluetooth in the "quick actions" buttons on my phone, so I can switch it on or off with just a swipe down from the top and then a single tap.