WiFi guide / i-TUP insights

Why my wifi slow?

Slow WiFi can disrupt streaming, calls, work and smart-home devices. Use this guide to check whether the cause is your connection, coverage, router, device or home setup.

WiFi & networkingPractical guide

This is an original i-TUP summary of common troubleshooting guidance, including the official StarHub guide below; it is not a reproduction.

Quick diagnosis

Start by separating speed from coverage.

WiFi speed

Everything is slow, even close to the router. Possible causes include the plan, router, cable, congestion or too many active devices.

WiFi coverage

The connection works near the router but weakens in bedrooms, corners or another floor. Try better placement or mesh WiFi.

01 / Diagnose

Common reasons your WiFi feels slow

Loose, damaged or unsuitable cables

A loose connection between the wall point, modem or router can affect the whole network. Older Ethernet cables may also limit speed to the router or device.

Try this: reseat every cable, check for bends or damage, and use a suitable Cat5e, Cat6 or newer cable where required.

Too many devices sharing bandwidth

TVs, cameras, phones, laptops, consoles and smart-home devices share capacity. Backups and updates can also consume bandwidth in the background.

Try this: pause downloads, disconnect unused devices and review the router’s connected-device list.

An older router or device

An older router may struggle with newer WiFi standards, many connections or a faster broadband plan. An older phone or laptop can also be the bottleneck.

Try this: compare a newer phone and older device in the same room. If only one is slow, check that device first.

Wireless congestion

In HDB blocks and condos, neighbouring networks may compete for the same channels, especially in the evening.

Try this: use 5GHz or 6GHz nearby where supported; use 2.4GHz for longer range and compatible smart-home devices.

02 / Test

How to check your WiFi speed properly

Test your speed before changing the setup: once near the router and once where the problem occurs.

1
Connect to home WiFi, pause major downloads and close apps using the connection.
2
Use a reputable speed-test site or the Speedtest app. Test three times and compare the average.
3
Repeat it beside the router, in the affected room and at another time. This helps distinguish distance from congestion.
4
If possible, run a wired test from the router. Fast wired results but slow WiFi usually point to wireless coverage or the router.

Test result	Likely meaning	Next step
Slow everywhere	Plan, router, cable or network issue	Check cables, restart and review plan/router
Fast near router, slow elsewhere	Coverage or placement issue	Consider repositioning or mesh WiFi
One device is slow	Device or software limitation	Update, restart or test another device

03 / Fix

10 things to try before upgrading

1. Restart your router

Power it off, wait about 30 seconds, then allow a few minutes to reconnect.

2. Move the router higher

Keep it open and elevated, away from cabinets, large appliances and thick obstructions.

3. Use the right WiFi band

Use 5GHz or 6GHz nearby for speed; use 2.4GHz for range and compatibility.

4. Pause background activity

Pause cloud backups, large updates and downloads when you need a stable connection.

5. Update your devices

Install current operating-system, driver and router-firmware updates.

6. Forget and reconnect

On the affected device, forget the WiFi network, then reconnect with the correct password.

7. Reduce interference

Keep the router away from cordless phones, Bluetooth hubs and dense electronics clusters.

8. Test at another time

Compare off-peak and evening results to spot congestion patterns.

9. Check connected devices

Remove unfamiliar devices and check how much bandwidth cameras, TVs and consoles use.

10. Consider mesh WiFi

For multiple rooms or storeys, mesh units may improve coverage more effectively than a plan upgrade.

Quick answers

Should I upgrade my plan or get mesh WiFi?

They solve different problems. Good speed beside the router but weak speed elsewhere suggests placement or mesh WiFi. Slow results everywhere, including on a wired test, suggest checking the router, cables and broadband plan first.

What is a good WiFi speed?

A good speed supports your household’s activities without buffering, lag or dropped calls. Count phones, laptops, TVs, cameras, consoles and smart-home devices—not just people—when judging capacity.

Need a second opinion?

Let i-TUP help you plan a better-connected home.

Share your home type, room count and WiFi symptoms. We can help you assess router placement, mesh coverage and suitable StarHub broadband options.

Chat with i-TUP on WhatsApp

Next i-TUP guide

Keep visitors connected without exposing your primary network. See the setup steps and security settings to check.

Read the guest WiFi guide →

Official resources