Change your wireless channel
Wireless routers send out their signals on a number of overlapping channels. There's a good chance that other wireless routers in your areas -- from neighbours or nearby cafes and businesses -- may be running on the same channel(s) as your own. The two main bands for carrying Wi-Fi today are 2.4 GHz and 5 GHz. You want you route to be one channel which is as clear of traffic as possible. You can use free software and apps such as Wireshark, Wi-Fi Analyzer or Wifi Sonar to scan for suitable channels your area. You'll find a short FAQ on the how to use the Wi-Fi Analyzer here.
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