The video call freezes every evening around eight, the TV in the bedroom buffers, and a Black Friday ad says a new router will fix everything. Maybe. But a slow connection has at least four possible causes, and a new router only cures one or two of them. Spend half an hour finding out which one you have. It costs nothing, and it tells you whether to move a box, change a setting, call your internet provider or actually buy something.
First, match the symptom to a suspect
| What you notice | Most likely bottleneck | Test that confirms it |
|---|---|---|
| Slow everywhere, even right next to the router | Your internet plan or the provider’s line | A speed test on a computer plugged in by cable |
| Fast near the router, slow in certain rooms | Distance, walls, router placement | Speed tests in several rooms |
| Slow only at busy times, many networks nearby | A crowded Wi-Fi channel, or everyone streaming at once | Repeat tests at a quiet hour and a busy hour |
| One device is slow, others are fine | That device: old Wi-Fi hardware, drivers, settings | Test a second device in the same spot |
| Connection drops entirely every so often | Modem or router needing a restart, firmware, or a line fault | Restart both and note whether drops return |
Step 1: Get a baseline the right way
Microsoft’s article on Wi-Fi and your home layout recommends running a speed test before changing anything, at “different places in your home,” and writing the results down so you can compare after each change. We add one test it does not mention: one with a computer plugged into the router by an Ethernet cable. That number is your plan and your provider’s line with Wi-Fi taken out of the picture.
- Pause big downloads and streaming on other devices.
- Run a test wired, next to the router. Write down download, upload and the time.
- Run the same test over Wi-Fi in the same spot.
- Repeat over Wi-Fi in the rooms where problems happen.
- Repeat the whole set at the time of day the trouble usually starts.
Step 2: Restart the modem and router properly
It sounds too simple, but it is the step Microsoft lists in its Wi-Fi troubleshooting guide for a reason. Its order: unplug the router, unplug the modem (remove a backup battery if the lights stay on), wait at least 30 seconds, plug the modem back in and wait for its lights to stop blinking, then plug in the router and give both a few minutes. If you have a combined modem-router, restart just that one box.
Step 3: Fix the router’s position
Microsoft’s placement advice is concrete: move the access point “towards the middle of your home or room if you can, and higher if possible,” because “placing it in a corner or under a desk can reduce your Wi-Fi signal strength.” Reduce the number of walls between router and device, and look for interference such as “a metal filing cabinet.” Routers end up wherever the cable enters the house, often in a basement corner or inside a TV cabinet. Getting it onto an open shelf in a central room is free and often worth more than a new model.
Step 4: Use the right band
Most routers broadcast on 2.4 GHz and 5 GHz, and newer ones on 6 GHz too. Microsoft sums up the trade: 2.4 GHz goes through walls better and works with almost everything, but is more crowded, partly because microwaves, cordless phones and Bluetooth share it. 5 GHz is faster with a shorter range. 6 GHz is fastest close to the router but needs a Wi-Fi 6E router and a device that supports it.
Here the two big vendors give opposite advice, which confuses people:
| Question | Apple’s recommendation | Microsoft’s suggestion |
|---|---|---|
| One network name for all bands, or separate names? | “A single, unique name (case-sensitive) for all bands”; different names may make devices connect less reliably | Different names per band “so you’ll know which network you’re connected to”; Windows picks the best band when there is one name |
| Channel selection | Automatic, so the router chooses | Auto works on some routers; on 2.4 GHz pick channel 1, 6 or 11 if choosing by hand |
| 2.4 GHz channel width | 20 MHz | 40 MHz can cause problems with some older adapters |
Our take for a mixed household: keep one network name, as Apple recommends, because phones and laptops then move between bands on their own. Create separate names only temporarily, as a test, to confirm whether a problem device does better on 5 GHz. Both companies agree on 20 MHz being the safer width on 2.4 GHz.
Step 5: Check the router’s settings and firmware
- Firmware. Apple advises setting the router to install updates automatically if possible.
- Security. WPA3 Personal, or WPA2/WPA3 Transitional if you have older devices. Apple says to avoid WEP and anything with TKIP, which “reduce network reliability and performance” as well as security.
- Radio modes. Apple suggests enabling all Wi-Fi modes the router offers so every device uses the fastest one it supports.
- Double NAT. If both your provider’s modem and your own router are doing routing, Apple warns that “double NAT” can cause access problems. Ask the provider to put their box in bridge mode, or use only one.
Step 6: Rule out the device
Microsoft suggests connecting a different laptop or phone to the same network in the same spot: if that works, “the source of the problem is likely due to your device.” On Windows, its guide also lists the network reset commands to run from an administrator Command Prompt (netsh winsock reset, netsh int ip reset, ipconfig /release, ipconfig /renew). An old laptop with Wi-Fi 4 hardware will be slow on any router. If a laptop’s Wi-Fi vanished after an update rather than slowed, start with our guide to wireless adapters that disappear after an update; the Device Manager steps are the same.
When buying something really is the answer
| Your test results | What to buy, if anything |
|---|---|
| Wired speed is low | Nothing yet; talk to your provider or change plans |
| Good near the router, dead in far rooms after moving it | A mesh system or an extender; Microsoft mentions extenders as an option when moving the router is not possible |
| Router is several years old, no firmware updates, no WPA3 | A new router is justified for security alone |
| Everything fine except one old device | A new adapter or device, not a router |
If you land in the router row, our look at whether a Wi-Fi 7 router is worth it this year covers which features matter. And while you are in the router’s settings, it is a good moment to check what your smart TV sends out; see our smart TV tracking guide.
Sources
- Microsoft Support: Wi-Fi and your home layout
- Microsoft Support: Fix Wi-Fi connection issues in Windows
- Apple Support: Recommended settings for Wi-Fi routers and access points
Checked against Microsoft and Apple pages on November 2, 2026. Router menus differ by brand; use your router maker’s app or setup page.