Having problems with wifi,bluetooth and gps in my iphone 6 after iOS update

After last iOS 9.3 update my iphone 6 is having problems with wifi,bluetooth and gps. My wifi connection now is more slow and drops easily in a short distance. My bluetooth does the same. But the most important problem is my phone's GPS. I tried everything lile:

-Doing a network reset

-Doing a total reset and restore in my phone

-Doing reboot my phone two times.

- Checking and unnistalling third party apps

Nothing work. I was in the apple store where they checked my phone and they say everything is ok with the phone. I'm not crazy and I know when something is not working properly. Also I believe that is iOS 9.3 update the one reaponsible for my phone problems.

Please fix those bugs fast.