How easy—or how hard—it is to upgrade your firmware depends entirely on your device manufacturer and model. If you typed this in the second terminal u can press Enter. Most built-in antennas tend to be omnidirectional, so if you are buying an external one, it should be marked "high-gain" to Home wifi penetration make a difference. You can mount it on a wall, or put it on top of a shelf or a Home wifi penetration to get a better signal. So my complete command now looks like this: Any further, and the signal gets weak.