Installing Broadcom Driver on Debian Bullseye without Internet
How to Install Broadcom Wireless Driver on Debian Bullseye 11 without Internet Access.
First, to Install Broadcom Driver on Debian 11 you simply need any Online Computer with a Browser and a USB Stick to Copy the downloaded Packages.
But if you dispose of an Android Mobile Phone with Internet Acces, then an Easier Solution should be of using it! See: Internet Connection USB Tethering Guide.
Especially relevant: the Debian Bullseye broadcom-sta-dkms Driver Supports the following Broadcom Wireless Chipsets:
- BCM4311
- BCM4312
- BCM4313
- BCM4321
- BCM4322
- BCM43142
- BCM43224
- BCM43225
- BCM43227
- BCM43228
- BCM4331
- BCM4352
- BCM4360
Finally, for BCM4306/3 and BCM4318 see instead: firmware-b43-installer; again for BCM4301, BCM4306/2, and BCM4309 the Legacy bundle: firmware-b43legacy-installer.

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1. Launching Shell Emulator
Open a Terminal window
(Press “Enter” to Execute Commands) -
2. Checking Wifi Card Model
This is necessary only to Ascertain the Wireless Chipset ID
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