Unblocking the Hard-block wireless in ubuntu

Sometimes we come across an awkward situation where our wifi or bluetooth are "on" but still they dont work. In such a case , your wireless may be "hard-blocked". Summon the Terminal and let issue the following commands:

me@ubuntu:~$ rfkill list all
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: brcmwl-0: Wireless LAN
Soft blocked: yes
Hard blocked: no
3: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no

To unblock all the wireless , type in:

me@ubuntu:~$ rfkill unblock all

And bamm!! your problem is solved. Happy life :)