THE SHORT ANSWER

If 2.4GHz works but 5GHz does not, your router still has internet. The failing part is usually the 5GHz band, the device's 5GHz support, distance from the router, channel selection or band steering.

Start close to the router, test another 5GHz-capable device, then check whether the 5GHz network name is hidden, merged or disabled.

This is usually a Wi-Fi band problem, not a full outage

2.4GHz reaches farther and handles walls better. 5GHz is usually faster, but it is pickier about distance, walls, older devices and router settings.

So if 2.4GHz works, resist the urge to reset everything. The internet feed is alive. You need to find why the 5GHz side is not behaving.

Quick diagnosis table

What you seeLikely causeTry first
5GHz disappears far from the routerRange or wall lossTest close to the router
Only one device cannot use 5GHzDevice support or adapter issueCheck device specs and update driver
5GHz network name is missingBand disabled, hidden or mergedCheck router Wi-Fi settings
5GHz connects then dropsWeak signal, channel issue or roamingMove closer and test a lower channel

Try these fixes in order

Work from physical range to settings. That avoids changing router options when the device is simply too far away.

  1. 01

    Move the device close to the router

    If 5GHz works nearby, the issue is range, not the password or internet service. 5GHz can fade quickly through walls and floors.

  2. 02

    Check another 5GHz device

    If another phone or laptop uses 5GHz fine, the original device may not support 5GHz well or may need an update.

  3. 03

    Look for separate network names

    Some routers merge 2.4GHz and 5GHz into one name. Others split them. Check whether 5GHz is hidden, renamed or disabled.

  4. 04

    Restart the router without factory resetting

    A normal restart can bring back a stuck Wi-Fi band without erasing your network name or password.

  5. 05

    Update the router and device

    Firmware and Wi-Fi adapter updates can fix band steering and 5GHz compatibility problems.

  6. 06

    Try a safer 5GHz channel

    If the router allows it, test common lower 5GHz channels such as 36-48. Avoid random advanced changes if you are unsure.

Device notes

Older printers and smart devices

Many older printers, cameras and smart home devices only support 2.4GHz. That is normal and not a speed problem for those devices.

Laptops

If a laptop sees 2.4GHz but not 5GHz, check the Wi-Fi adapter model and driver. Some older adapters cannot use every 5GHz channel.

Mistakes to avoid

Do not assume 5GHz is always better. For range and older devices, 2.4GHz may be more stable.

Do not factory reset the router before checking whether the 5GHz band is simply disabled or out of range.

FAQ

Why does 2.4GHz work but 5GHz does not?

Usually because 5GHz has shorter range, the device does not fully support it, the router band is disabled, or the current 5GHz channel is not working well with that device.

Is 2.4GHz slower than 5GHz?

Usually yes, but it reaches farther. For printers and smart devices, 2.4GHz is often fine.

Should I split 2.4GHz and 5GHz names?

It can help troubleshooting because you can choose the exact band. Some homes work better with separate names.

Can walls stop 5GHz?

Yes. 5GHz is faster near the router but loses strength faster through walls, floors and distance.

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