I found out that bluetooth is not working on my laptop, these are the steps that i have tried so far:
1. Tried installing bluetooth drivers which i downloaded from dell website, particularly for my model, during installation it asks for "Activate Bluetooth using wireless switch". This is driver version i am trying to install R285455
2. From BIOS ensured that Bluetooth is ON
3. Wireless switch is on, which i believe works both for wifi and bluetooth
4. Bluetooth light is OFF in keypad
I am not sure if the message i get during installation : Activate Bluetooth during installation is correct.