I have several devices paired with my Xperia Z3 phone and lately when I try to connect an already paired device it fails. Often it's quicker to forget the pairing and then re-pair the device upon which it connects almost immediately. Why is bluetooth technology so inept and how can this issue be remedied? I was on a call with my friend and switched on my already paired bluetooth headset. It took 5 minutes before the phone finally transferred the call to the headset. Under the bluetooth settings manager it kept showing connecting and then nothing. I had to toggle bluetooth on/off on my phone multiple times as well as turn my bluetooth headset on/off several times before it finally worked. This is unacceptable.