The new IOS 9 is here. But, some new old problems. It is necessary to fix some pieces in it. This way, the system will do what it must to do.
Users have reported bugs during IOS 9 instalation. This is not a big deal. If you have this problem, try the by iTunes.
2. Facetime stopped
To fix this, go to "Settings" and look for "Messages". Turn off this and turn it back on. If it doesn't work, restart your device and reset network settings.
3. Bluetooth error
This is very simple. Reset the network settings.
4. Wifi error.
Very simple too. Select option to forget the specific network. Then, click again to acess as in the first time.