I'm not sure, and I am sure that you went around and around with it, having been through three phones. But, are you sure your are actually going to "NO Bluetooth"? Could the phone still be picking up and automatically staying connected to either your car bluetooth or some bluetooth headset that you have it paired with. The bluetooth can and will work up to 30 feet away. In fact, I use a stereo headset around the house and leave the phone in my bedroom on charger and can walk 50 feet away, with walls between me and the phone before I start losing the signal and sound begins cutting out (just example of how some of the BT signals are). Did you try disabling the bluetooth on your device in your 'settings' to see if the phones internal speaker then works?
