@DeerLucid: If I were a broadband technician, I'd never tell you—slow internet speed doesn't require spending money to fix. A house call charges 200 yuan, but it's resolved in two minutes? That won't do. So today I'm revealing the industry secret: if you learn this, I'll have one fewer person to overcharge. You think technicians come to fix your network? Naive. They come to perform. Look left and right, scan the router with their phone…

If I were a broadband technician, I'd never tell you this—slow internet speed doesn't cost money to fix. A house call charges 200 yuan, but it's fixed in two minutes? That's not acceptable. So today I'm spilling the industry secret: once you learn this, I'll have one fewer person to rip off. You think technicians come to fix your network? Think again. They come to put on a show. They look around, scan the router with their phone, muttering about 'signal interference' and 'channel conflicts' to sound extra professional. Actually? While you're not looking, they flip the router over, change 5 settings in the backend, and they're done. Step 1: Turn off 'dual-band merging' This feature seems fancy, but it mixes the 2.4G and 5G bands, causing devices to switch frequently and actually worsening the signal. Log into the backend, find wireless settings, and disable it. Step 2: Set signal strength to 'wall-penetration mode' The router's default is 'normal mode', where the signal loses half its strength after passing through one wall. In the backend, find the signal strength option and set it to the highest level (wall-penetration/boost mode). This setting is hidden deep, so regular users can't find it—that's why I have the chance to charge you 200 yuan. Step 3: Change wireless channel to auto Channel congestion does cause interference, but manually selecting a channel isn't as good as letting the router decide. Change it to 'auto' for real-time optimization. Step 4: Kick off freeloaders Sometimes slow internet isn't a router issue; it's because the password is too simple, and your neighbor has been using it for three years without you knowing. Log into the backend, check the list of connected devices, blacklist anyone you don't recognize, and change the password to WPA3 with a complex combination. Step 5: Restart the router After changing all settings, pretend to think for a moment, then slap your thigh: 'It's a cache issue!' Then restart. The cache clears, the new settings take effect, and the internet speed instantly improves. That's it—just these 5 steps, and you can fix it yourself in 5 minutes. A technician takes 10 minutes to charge 200 yuan, but you can do it yourself for free. Save this article, and next time your internet is slow, check the router yourself and save 200 yuan—doesn't that sound good? — I am 概率鹿梦｜@DeerLucid, using probabilistic thinking to analyze wealth and human nature, building moats in the AI era together.