A note here - different countries have different Wi-Fi regulations, and you could be in violation of your conutry laws. So stop here if that is an issue.
For fun, we will change ours to Great Britain and bring the interface back up:
Now let's change the power level: 'iwconfig wlan0 txpower 18'
You may or may not be allowed to up your power level.
Imagine for a moment if you lowered someone's power level to 5 dBm or less - hmmm.
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