Oh dear, what a depressing experience. There's another thread in the forum about the Mk 3 Jazz ruining Honda's reputation and sadly you're adding evidence to that.
Can't really comment about your Bluetooth issue (apart from wondering why, if it's a phone problem, it would work for a few calls but not thereafter). But with regard to this:
The phone issues are only the tip of the iceberg, the car has been throwing up various spurious warnings with its driver safety aids (parking sensors, auto start stop, crash avoidance etc) it has been back to the dealer 5 or 6 times since mid June. Not what I would expect from Honda. I was initially told the issues I was having was due to the exceptionally high temperatures we were having, now it has cooled down things are much better.
I can say that the hot weather has not caused any such issues with my car, the dealer appears to be telling you porkies. If he insists on telling you the car can't cope with hot weather, get him to put it in writing, then you would have evidence that the car is not fit for purpose (should you get into the unfortunate situation of thinking about rejecting it
).
The systems you mention do have their quirks that surprised me at first:
- The parking sensors are very sensitive and start shouting at you when you're still a safe distance from any obstructions. I frequently have to parallel-park into small spaces and can have both front & rear sensors sounding off simultaneously, so I then have to turn the cacophony off, which kind of defeats the object.
- The auto stop-start has so many safeguards that inhibit it, that it's often difficult to understand why it's not working. Check the handbook for a full list, but it includes such esoteric items as the ventilation being set to "screen", and limits on battery internal temperature.
- "Crash Avoidance": if you mean the Forward Collision Warning (as distinct from the City Brake Active) then I find there are circumstances when that false-alarms if there's an obstruction in the camera's field of view. Eg a parked car on the nearside of a RH bend, or an oncoming car on a LH bend, or if you're moving up into an overtake position. None of those are impending collisions but the system can think they are so sometimes sounds off unnecessarily.