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phone connects to WiFi with full signal, but can't open web pages or watch videos, and the icon even has an exclamation mark? Don't criticize the carrier or restore the factory for now. Last month, my family had a bit of trouble. By following these 5 steps to check the phone's DNS from the optical modem, we can pinpoint the problem in just 5 minutes. ...

the router has poor signal, don't rush to replace it—it's probably in the wrong position. This article records my real-world test of moving the router at home to five locations: the weak current box, TV cabinet, and refrigerator ceiling, all of which I dismissed. I was particular about height, antenna angle, and ground clearance, and in the end, the signal strength increased by 12 dB. ...

gigabit broadband measured only about 200 Mbps, is it the carrier's cutting corners or their own equipment holding them back? This article records my entire investigation step by step: first, get the speed test method right, then check the network cable, optical modem, router network card, and in the end, the real culprit is actually the cheapest cable. Attached is a comparison and troubleshooting sequence table for network cable categories. ...

just because guests come to your home and you have to give out the WiFi password? That's how the password was leaked. This article describes my complete process of opening the visitor network: isolating from the mainnet, limiting speed, limiting duration, and then controlling parental control to lock the internet time on my child's tablet—I've listed all the brand entry points. ...

WiFi a full bar is always slow; it's probably a collision in the channel. This article covers the entire process of using WiFi Magic Box to check channel usage, the principle that 2.4G only recognizes 1/6/11, how to choose a 5G channel, two pitfalls I made when choosing a channel manually, and includes entry points for channel changes from various brands. ...

Don't throw away an extra idle router at home—switch to AP mode to use as a switch. Plug it in and you'll have four more network ports and expand WiFi. This article clearly explains how to connect the two routes: LAN port cascading and AP mode. I've already gone through all the pitfalls of whether DHCP is turned off, whether to plug the network cable into WAN or LAN, and so on....

Xiaomi routers slow down and disconnect after prolonged use, nine times out of ten are caused by not restarting for a long time. This article explains how to set a scheduled restart in the backend of 192.168.31.1 and the Mi Home app. For old firmware that can't find the entry point, there's a trick: mine set it to automatically restart every Wednesday at 4 a.m. ...

Internet speeds freeze at night, data speeds up inexplicably, and it's probably because WiFi has been exploited. This article explains how to unplug each device that uses the internet in the background of the router, then block the door with three layers of protection: turning off WPS, switching to WPA3, and using MAC filtering. I've also written the settings paths for Xiaomi and TP-Link....

the router suddenly shows a red light and can't access the internet, don't rush to hit reset. This article will follow the order I repair my own network: what do traffic lights mean? How to distinguish between the optical modem's LOS flashing red light and the router's system red light; 6 steps to determine whether it's the optical modem, broadband, or router's fault? The last trick can keep your broadband password from resetting. ...

Forgetting your WiFi password, many people's first reaction is to reset their router—but end up losing their broadband account and password too. Actually, there are three ways to discreetly regain it: checking connected devices, changing passwords in the management backend, or scanning QR codes directly. This article explains everything from easy to difficult....