A video call that freezes in the back bedroom doesn’t necessarily mean your internet plan is too slow. If the call works beside the router, the problem is likely the wireless connection between that room and the router. If a computer plugged into the router is slow too, moving the router probably won’t help.
That distinction can save you a support call—and keep you from paying for a faster plan that leaves the weak room just as weak. Start with a few tests, then fix the part of the connection that’s actually failing.
Find out what’s slow
A speed test on a phone measures the whole path: the internet connection coming into your home, the router, the Wi-Fi signal and the phone itself. It can’t identify the trouble spot on its own.
- Check the download and upload speeds on your bill or plan details. The plan’s broadband label may also show typical speeds.
- Pause large downloads, cloud backups and streams on other devices. Turn off a work VPN on the test device if you can do so safely.
- Run a speed test on a laptop connected by Ethernet to a LAN port on your router or combined modem/router. Turn off the laptop’s Wi-Fi so you know it’s using the cable.
- Run the same test on Wi-Fi near the router, then in the room where you notice the problem. Use the same device if possible, and repeat the tests at another time of day.
The wired test gives you the clearest practical check of the connection through your router. A router app may also offer a separate test from the router to the internet; don’t confuse that with a test from your phone over Wi-Fi. Speed-test results are snapshots, so look for a consistent pattern rather than judging one result.
Here’s how to read the pattern:
| What you find | Where to look next |
|---|---|
| Ethernet is fast, but Wi-Fi is slow only in distant rooms | Router placement, walls or coverage |
| Ethernet is fast, but Wi-Fi is slow even beside the router | Router settings, interference or the test device |
| One device is slow while others work well in the same spot | That device, its software or its Wi-Fi hardware |
| Ethernet and Wi-Fi are both slow | Household usage, cables, equipment or the provider connection |
“Fast” means reasonably close to what your equipment and plan can deliver—not necessarily identical to the number in an advertisement. A laptop’s Ethernet port, adapter or cable can limit a wired test, while Wi-Fi speeds depend on the device and conditions in the home. If you’re unsure what speed you bought, review how internet plans describe speed, data caps and fees before deciding that you need an upgrade.
Restart the equipment and check the cables
Before changing settings, look at the modem and router. A modem connects your home to the provider; a router connects your devices to that service. They may be two boxes or one combined gateway.
Make sure power and network cables are firmly seated. Check the equipment’s status lights against its manual or your provider’s app. If you have separate boxes, unplug the router and modem, wait about 30 seconds, then power up the modem first. Once its connection lights settle, power up the router and let it finish starting. For a combined gateway, restart that one device. Everyone in the home will briefly lose the connection. Microsoft recommends this order for a modem and separate router.
Restarting is different from pressing the recessed reset button. A factory reset can erase your Wi-Fi name, password and other settings; leave it for a specific reason and make sure you know how to set the equipment up again.
If a wired test repeatedly lands around 100 Mbps on a much faster plan, check the cable between the modem and router, the test laptop’s adapter and any switch in the path. A slower port or link can cap the connection; Google’s router troubleshooting guidance recommends checking cable and port ratings when speeds fall short. Don’t buy new Wi-Fi equipment to solve a wired bottleneck.
Fix weak coverage before changing your plan
When the wired test is good but speed drops as you walk away from the router, change the router’s position if you can. Put it in the open, off the floor and closer to the center of the space you use. A router inside a cabinet, behind a TV or at one end of the house has a harder job than one on an open shelf. Walls, concrete and metal can weaken the signal; nearby electronics can interfere with it. Move the router a little, then retest in the problem room rather than guessing from its Wi-Fi bars.
You may not be able to move a modem or fiber terminal far from its installed location. If the router is separate, a suitable Ethernet cable may let you place it somewhere more useful. Check that the cable is routed safely and that the new spot has ventilation and power.
Try the available Wi-Fi bands, too. The 2.4 GHz band generally reaches farther and gets through obstacles better, but it tends to be slower and more crowded. The 5 GHz band generally offers higher speeds over a shorter distance. A supported 6 GHz connection can perform well near the router, but its range and device compatibility are more limited. If your router shows separate network names, compare them in the problem spot. If it uses one name and selects bands automatically, you don’t need to split the network just to troubleshoot it.
If one room remains weak after you improve placement, additional coverage may be justified. An access point connected by Ethernet is a strong option where you can run cable. A mesh system or extender can help where you can’t, but a wireless node needs a good connection back to the main router. Put it between the router and the weak room—not in the dead zone itself. If you already own a mesh system, run its connection test and move a weak node closer to the main unit. A phone can show strong signal to a mesh node even when that node’s own connection is the bottleneck.
Check the device and what else is using the connection
If just one phone or laptop is slow, test a second device in the same place. Then restart the slow device, reconnect it to your home network and install available operating-system updates. On a Windows laptop, the built-in network troubleshooter and the device maker’s Wi-Fi driver are sensible next checks. Leave a full network reset for later: it removes saved network-adapter settings and may mean setting up VPN software again.
If several devices slow down together only when the household is busy, look for competing traffic. A game download, computer backup or multiple streams can use enough of a connection to affect everyone else. Pause them briefly and retest. Many router apps show connected devices and their usage, which can help you find an unexpected download. If a work VPN or one website is the only thing running slowly, test another service before blaming your entire connection.
Pay attention to upload speed when video calls stutter or file backups crawl. Download and upload are separate measurements; a healthy download result doesn’t rule out an upload problem.
Make modest router-setting changes
Open the router maker’s app or settings page and check for a firmware update. Enable automatic updates if the router supports them. Then look at the Wi-Fi settings before changing anything. Write down the original values so you can undo a change that makes performance worse.
For most households, automatic channel selection is a good starting point. If nearby networks are crowding your channel and automatic selection isn’t helping, test a different channel and compare results. On a crowded 2.4 GHz network, a 20 MHz channel width can improve reliability. Keep the supported bands enabled rather than disabling one in pursuit of a single high speed-test number. Apple’s router-setting guidance covers firmware, channels, channel width and security options; your router’s controls may use different names.
Avoid changing several settings at once. Otherwise, you won’t know which change helped—or which one knocked an older device offline. If you use both a provider gateway and a separate router, also check whether both are broadcasting Wi-Fi unnecessarily. Two nearby networks can interfere with each other, though you should confirm how your equipment is set up before switching either one off.
Call the provider with evidence, not just a complaint
It’s time to contact your internet provider when wired speeds remain consistently below expectations after you’ve paused household traffic, restarted the equipment and checked accessible cables. Call sooner if the modem or gateway shows a connection fault, or if the service drops out on wired devices too.
Have your plan speed, equipment model, test times and download/upload results ready. Tell the provider whether the tests used Ethernet or Wi-Fi and whether the problem affects every device. Ask them to check for an outage, a line or signal issue, and any equipment or plan limit that could explain the results. If wired speed is healthy but one room is slow, describe it as a coverage problem; the provider may be able to help with its gateway, but a higher-speed plan alone won’t remove the walls between that room and your router.
The most useful result of troubleshooting isn’t always a faster speed-test number. It’s knowing which part of the connection needs attention before you spend money or time on the wrong fix.