1.Not able to connect other iPhones through bluetooth

Hi,

1. Bluetooth is not working for me in iPhone 5. Not able to connect even other iPhone through my bluetooth.

2. Wifi not working properly sometimes. Example If i connect my mobile with the wifi network it was connected first, then i disconnect the Wifi modem after that i switch on the modem then connect the wifi it is searching long time.

3.Camera- I took a snap with Flash mode (ON) in the very dark area.The photo dispays full of white color.