Broadcom BCM43xx Wireless Cards

Open a terminal. code:

oem@freekbox:~$sudo apt-get install bcm43xx-fwcutter
Password:
Reading package lists... Done
Building dependency tree... Done
The following NEW packages will be installed:
  bcm43xx-fwcutter
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 16.6kB of archives.
After unpacking 102kB of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com dapper/universe bcm43xx-fwcutter 20060108-6build1 [16.6kB]
Fetched 16.6kB in 0s (169kB/s)
Preconfiguring packages ...
Selecting previously deselected package bcm43xx-fwcutter.
(Reading database ... 154295 files and directories currently installed.)
Unpacking bcm43xx-fwcutter (from .../bcm43xx-fwcutter_20060108-6build1_i386.deb) ...
Setting up bcm43xx-fwcutter (20060108-6build1) ...

oem@freekbox:~$

This will install a program that will fetch the required firmware for Broadcom 43xx cards. Now we have to run it. code:

oem@freekbox:~$sudo /usr/share/bcm43xx-fwcutter/install_bcm43xx_firmware.sh

Reboot and test your wifi.