Connect your laptop to the internet via ethernet and search for "find additional hardware drivers". The OS will scan your system and find any hardware in-need of a driver and if one is found, will download it and install it. What version of fedora are you using?

First dnld this file from given URL: http://downloads.openwrt.org/sources/broadcom-wl-4.150.10.5.tar.bz2
extract it and go to the folder: broadcom-wl-4.150.10.5/driver
after that pass the following command as root,
b43-fwcutter -w /lib/firmware wl_apsta_mimo.o
Reboot Fedora again and start NeworkManager and check for networks. Hope it will solve ur probs !