1, the router location is not good
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One of the main reasons your phone's WiFi is slow is because you've placed your router in the wrong place.
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According to the specifications and design of the router, the outdoor signal range can be up to 400 meters or so, and the farther the signal goes, the slower the network speed. WiFi signals can also be blocked by large physical objects such as walls, floors, and doors.
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2. Congested WiFi
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Another router problem that slows down mobile Internet speeds is congestion. Routers broadcast their signals on designated channels, but if your neighbors set their routers to the same channel, it could turn the WiFi signal into congestion and slow down everyone's network speed.
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This can be a problem, especially in apartment buildings where there are a lot of routers crammed into a relatively small area.
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To solve this problem, you need to use software that can help you find the best channels for your router, and we recommend the Wi-Fi Analyzer app on Android. It's harder to do on the iPhone, but the old iOS AirPort app still works. Both apps are free.
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3. WiFi noise
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WiFi is also susceptible to noise from other appliances in the home, such as air conditioners, televisions, microwave ovens, wireless doorbells, etc., which can interfere with signals from routers operating in the 2.4GHz band.