In several case Broadcom 43xx Wireless Card often getting error in Ubuntu (since ubuntu 8.04), some of them `recognize` the device but the wireless didn't work moreover the system can't detect any wireless installed (no wireless found). Regarding to that problem many forum have been discussed, here are summary of step by step how to fix Broadcom 43xx Wireless Card Error in Ubuntu.

Make sure Broadcom Wireless card installed properly
First step, make it sure that some of Broadcom Wireless card has been installed properly and detect by kernel, do following command on the terminal :

lspci | grep Broadcom\ Corporation
If give following output :
0000:02:0d.0 Network controller: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller (rev 03)
it's mean that your Kernel has been recognize your device, if that command above didn't give any output but you're sure that Broadcom Wireless has been installed do following command and restart.
sudo apt-get install bcmwl-kernel-source
sudo reboot    

Installing Broadcom 43xx Wireless Driver in Ubuntu
Second step, After make the system recognizing your device, next step is installing appropriate driver to your device, if your device is any of these :
  • BCM4306/3
  • BCM4311
  • BCM4318
  • BCM4321
  • BCM4322           
do following step :
sudo apt-get install b43-fwcutter firmware-b43-installer bcmwl*
sudo reboot
other, if your Broadcom Wireless series is any of these :
  • BCM4301
  • BCM4303
  • BCM4306/2
  • BCM4306
do following step :
sudo apt-get install b43-fwcutter firmware-b43legacy-installer bcmwl*
sudo reboot
if you have completed all the steps above without error you should have Broadcard Wireless on your system, try to open your network manager and connect to any hot spot.