After problems with a previous Sony phone AX1 that kept turning off I was sent an AX1 Ultra as a replacement.
This has now developed problems with the blue tooth as it keeps 'fluttering' on and off. In the car it will connect for about 30 secs then turn off again. With my Fitbit it does the same (meaning updates take hours rather than minutes). I am unable to use it in the car so is a issue when on long journeys being unable to take calls. My car is a Toyota Yaris - 2 yrs old.
Thinking about trading it in very soon as I'm at the end of my tether so this is a last chance saloon to rescue it!