A:Answer Hello, please be advised that once a device (phone/tablet) has on Bluetooth and is already connected to the unit and is within 32 feet (10 meters) it will be activated, this does not have to be yours, it can be from someone who is in the same proximity. To cancel Bluetooth mode you can press the ECO button on the remote control. If this does not resolve the issue, we suggest a reset, this can be found on page E-19 'factory reset' of the manual which can be accessed from this link: https://data2.manualslib.com/pdf6/129/12851/1285005-sharp/xlbh250.pdf?003dd176594e9ff854da8fda66096767