Slow WiFi affects streaming, gaming and work. This guide covers the most common causes of slow internet, how to test and check your WiFi speed and 10 step-by-step fixes to increase your WiFi speed!
| 10 Proven fixes for slow WiFi and internet | 30s To check your WiFi speed and know where the problem is | #1 Singapore has the fastest fixed broadband in the world |
Pinpoint exactly why your WiFi is slow with a structured troubleshooting approach
Learn how to check your WiFi speed accurately and understand what the results mean
Follow 10 proven fixes to increase your WiFi speed, from quick wins to long-term upgrades
Before troubleshooting, it is important to identify the root cause of your issue.
The "Water Flow": How fast data moves to your device. This guide fixes slow downloads, buffering, and lag.
The "Pipes": Whether the signal even reaches your room. If you have "dead zones," check out our other guide.
Slow WiFi in Singapore usually comes down to 1 of 4 causes. Identifying which one applies to you is the fastest way to fix it.
A frayed or loose cable between your wall point and router restricts data flow regardless of your plan speed. Even a partially disconnected cable causes packet loss that shows up as buffering and lag.
Fix: Check that every cable is plugged in firmly. Replace any that look worn, kinked, or bent. If you have a Cat5 cable (not Cat5e or Cat6), it is capping your speed at 100 Mbps.
Your WiFi divides its bandwidth across every connected device. Phones, laptops, smart TVs, security cameras, robot vacuums, and smart home gadgets all take a share. When 15 to 20 devices are online at once, each gets a smaller slice.
Fix: Turn off WiFi on devices you are not actively using. Check your router's connected device list for anything unfamiliar.
WiFi standards have improved significantly over the past few years. A router more than 3 to 4 years old likely runs WiFi 5 or older, which struggles to handle 10 or more devices at once. Older devices stuck on WiFi 4 standards also limit themselves even on a fast network.
Fix: Run a speed test on a newer phone and on your older laptop. If the phone is fast and the laptop is slow, the problem is the device, not the WiFi. If both are slow, the router or plan is the issue.
In HDB blocks and condos, your WiFi signal competes with neighbouring routers. The 2.4 GHz band has only 3 non-overlapping channels (1, 6, and 11), meaning many routers land on the same one. This is worst during evening peak hours, 7 pm to 11 pm.
Fix: Switch your devices to the 5 GHz or 6 GHz network. For 2.4 GHz devices, use a WiFi analyser app to find the least crowded channel and manually set your router to it.
Not sure which one applies to you?
The next section shows you how to test your speed so you know exactly where the problem is.
Run a speed test before trying any fixes. It takes 30 seconds and tells you whether the problem is your WiFi, your device, or your broadband plan.
Method 1
Use a Speed Test Website
Make sure your device is connected to your home WiFi, not mobile data.
Go to speedtest.sg for the most accurate Singapore results (local servers reflect real local performance). Alternatively, use speedtest.net or fast.com.
Hit Start and wait 15 seconds. Run the test 3 times and use the average for a reliable reading.
Test at different times. If speed drops significantly between 3 pm and 9 pm, peak-hour network congestion is the culprit.
StarHub users: On speedtest.net, tap the server name and switch to "StarHub". This tests your connection directly against StarHub's network for the most accurate result.
| Result | What It Tells You | Good Target |
|---|---|---|
| Download speed | How fast things load: videos, web pages, and app downloads. | At least 50% of plan speed |
| Upload speed | How fast you send data: video calls, file uploads, and cloud backups. | 10+ Mbps |
| Ping (latency) | How quickly your device talks to the internet. Lower is better. | Under 20ms (gaming); Under 50ms (calls) |
Pro tip: Stop all downloads and close other apps before testing. For the most accurate reading, run a wired speed test by plugging an Ethernet cable directly into your router. If wired speed is fast but WiFi is slow, the problem is your WiFi setup, not your broadband plan.
Method 2
Use a Mobile App (Best for Room-by-Room Testing)
Download Speedtest by Ookla (free on iOS and Android). Run the test next to your router for a baseline, then walk to each room and test again. This shows you exactly where your WiFi weakens.
Pro tip: Run 3 tests and use the average. Close other apps and stop any downloads first so nothing else eats into the result.
A good WiFi speed is one where nothing buffers, lags, or drops, no matter what everyone in the home is doing at the same time. In Singapore, we have the fastest fixed broadband in the world—even mid-tier fibre plans here outpace what most countries offer at their top tier. The bottleneck is rarely the plan itself, but how that speed is shared.
The more useful question is whether your plan has enough headroom for your device load.
| Devices online | Typical activities | Without enough headroom | Recommended plan |
|---|---|---|---|
| 10 to 20 | 4K streaming, gaming, WFH video calls, cloud backup | Peak-hour buffering across the household | 3 Gbps Plan → |
| 20 to 40 | Smart home ecosystems, simultaneous 4K streams, cloud gaming | Simultaneous heavy tasks saturate the plan | 5 Gbps Plan → |
| 40 or more | 8K content, NAS storage, home office & entertainment in parallel | Pushing limits today; device counts will grow | 10 Gbps Plan → |
Pro Tip:
Most households underestimate their device count. Before deciding, open your router app and count devices—smart TVs, security cameras, and even robot vacuums consume bandwidth in the background. The number is almost always higher than expected.
These take less than 5 minutes and solve the problem for most people.
Unplug your router from power. Wait 30 seconds. Plug it back in and wait 1 to 2 minutes for it to reconnect.
Why this works: Routers build up temporary glitches over time, like a computer that has been running for weeks without a restart. Power cycling clears these out and gives it a fresh start.
Apps like Google Drive, iCloud, Dropbox, and software updaters quietly download and upload data even when you are not using them. Close what you do not need, especially on phones and tablets.
Why this works: Background uploads are invisible bandwidth hogs. Closing them instantly frees up speed for the things you are actively doing.
Most routers broadcast 2 WiFi networks: 1 on 2.4 GHz and 1 on 5 GHz. You will usually see them in your WiFi list as something like "MyWiFi" and "MyWiFi_5G". Connect to the 5G version on the devices you use most (laptop, phone, smart TV).
Why this works: The 2.4 GHz network is crowded. In an HDB or condo, dozens of your neighbours' routers are on the same 2.4 GHz channel, and they all interfere with each other. 5 GHz is less crowded and much faster. The tradeoff is shorter range, so it works best when you are in the same room or 1 room away from your router.
Your browser stores old website data to load pages faster, but over time this stored data gets bloated and slows things down. In Chrome: Settings > Privacy and Security > Clear Browsing Data. In Safari: Preferences > Privacy > Manage Website Data > Remove All.
Tried all of these and still slow?
Keep reading. The next section covers fixes that take a bit more effort but solve deeper problems.
If the quick fixes did not solve it, these go deeper.
WiFi signals get weaker every time they pass through a wall, door, or piece of furniture. If your router is tucked in a corner or hidden inside a cabinet, it is working harder than it needs to.
| ✓ Do This | ✗ Avoid This |
|---|---|
| Place it in a central room (living room for most HDB flats) | Hiding it behind the TV or in a storeroom |
| Put it on a shelf or mount it on a wall | Leaving it on the floor |
| Keep it away from metal objects and appliances | Placing it near a microwave or cordless phone |
After moving it: Run a speed test in each room to see if the weak spots have improved.
If you have a desktop, gaming console, or work laptop near the router, connect it with a network cable instead of using WiFi. A wired connection is always faster and more stable because it skips all the wireless interference.
Which cable?
Look at the small text printed on the cable itself. Cat5e supports speeds up to 1 Gbps. Cat6 or Cat6a supports up to 10 Gbps. If you are on a fast broadband plan and using an old cable, the cable might be your bottleneck.
Bonus: Plugging in even 1 device takes it off the WiFi network entirely, freeing up wireless bandwidth for your phones and tablets.
Log in to your router's settings page (usually by typing 192.168.1.1 in your browser). Look for a "Connected Devices" or "Client List" section. If you see devices you do not recognise, someone else is using your WiFi and taking a share of your speed.
Fix it: Change your WiFi password. In dense housing like HDB blocks and condos, this is more common than you would expect.
Routers run their own software (called firmware), and manufacturers release updates to fix bugs and improve performance. Log in to your router's settings page or app and check for updates. Restart the router after updating.
Good to know: Many newer routers update themselves automatically. But if yours is a few years old, it is worth checking manually.
Every time you visit a website, your device looks up its address using something called DNS. Think of it like a phone directory for the internet. The default directory your device uses is sometimes slow. Switching to a faster 1 makes websites and apps start loading quicker.
Go to your router's settings page (type 192.168.1.1 in your browser).
Find the DNS settings and change them to 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google).
Save and restart your router.
Note: This will not make your download speed faster. It speeds up the moment before data starts flowing, so pages and apps feel snappier to open.
Tried all of these and still slow?
Keep reading. The next section covers fixes that take a bit more effort but solve deeper problems.
If you've tried the fixes above and WiFi speed is still a problem, use this to narrow down the culprit.
Symptoms: WiFi is slow but wired speed is fast. Multiple devices lag at once, or your router is 3+ years old.
What to do: Upgrade to a WiFi 6 or WiFi 7 router to handle more devices at higher speeds.
Symptoms: Both wired and WiFi are slow. Your speed test results are already close to your plan’s maximum.
What to do: Upgrade to a faster Fibre plan. No amount of hardware tweaking can push you past your plan's limit.
Symptoms: Speed is perfect near the router but drops significantly in bedrooms, the kitchen, or hallways.
What to do: Add a Mesh WiFi system to eliminate dead zones. See our WiFi coverage guide for options.
Symptoms: Speed is fine during the day but drops consistently in the evenings (7 pm – 11 pm).
What to do: Use the 5 GHz band, or switch to a higher-tier UltraSpeed plan for more headroom.
Quick answers to your most pressing questions about diagnosing, managing, and optimizing your home WiFi performance.
Older devices use older WiFi technology, which limits their speed. If your phone is fast but your laptop is slow, the laptop is the bottleneck. Try testing speed on a few different devices to confirm.
A strong signal does not always mean fast internet. This usually means too many devices are sharing the connection, or your neighbours' WiFi is interfering with yours. Try the wired test from the section above to narrow it down.
They fix different problems. Mesh WiFi fixes coverage (signal dropping in far rooms). A faster plan fixes speed (everything is slow everywhere). If speed is fine near the router but bad in other rooms, go mesh. If speed is bad everywhere, go for a plan upgrade.
Plug a device directly into your router with a cable and run a speed test. If wired speed is much faster than WiFi, your router is the weak link. Routers older than 3 to 4 years typically struggle with many devices and do not support the latest WiFi standards.
A good speed is 1 where nobody in your home experiences buffering or lag. For most Singapore households with multiple people and 10+ devices, a fibre plan of 3 Gbps or above provides enough room for everyone to use the internet comfortably at the same time.
2.4 GHz reaches further but is slower and more crowded (especially in flats where many neighbours share the same channel). 5 GHz is faster and less crowded but does not reach as far. Connect to 5 GHz when you are within a room or 2 of your router. For a deeper explanation, see our frequency bands guide.
If your broadband plan or router is the limit, StarHub UltraSpeed Fibre Broadband gives your household the speed to stop worrying about WiFi.
Disclaimer:
This content is provided for general information and convenience. While we take care in preparing our articles, readers should refer to official sources or professional advice for specific, up-to-date details.
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