having connection problem with bluetooth and wifi after update

[afterupdate]

before update everything works fine.

after update, the xperia m4 cannot make connection with nikon 1 J5 with wifi.

and after update, I cannot talk in BMW X5 2015. I can hear the other side talking but they cannot hear from me.

would like to downgrade to before if possible.

[afterupdate]

chatted on line with service and he gave a link to download comapnion to repair the software.

still has the problems after the repair.

[afterupdate]

the service said sony is not responsible for campatiblility with 3rd party products.

connection to the car and camera is very important to me.

has to change the phone if no way to solve the problem.

[Uliwooly]

You might have to send it in to get it inspected >>> Local support