Same issues with mine. Bluetooth wont scan, wont find ither devices, wont pair with fit bit, wifi drops out, . I sent it away to be repaired. The loan phone is an old J5 and works perfectly. My A8 plus came came back first time with no identifiable issue. Guy in store transferred my phone contents back on, turned on bluetooth wouldnt scan, fot bit wont connect coukdnt locate other devices. So still not working so back in for a second try at repair
My wife and I both have A8s that connect fine. By the way, the header of this thread is pretty meaningless now, I wonder how many updates there have been since it started?
I must say it was very convenient that the problems started straight after a Update, and also on a phone which has had no third party apps downloaded since I set it up 😏