Hi, not an IT expert here, just want to ask I have 2.4GHz WiFI and 5GHz WiFI, but everytime I connect to the 5GHz WiFI I cannot load anything, and only 2.4GHz one work, any ideas to solve this.

Thanks.

What is the Device that connect?
What is the place you connect to it?
Cafe?
I hope u r not here for Thread count

Google up "2.4ghz vs 5ghz wifi"
You might find your answer there

your device and modem too far to connect 5ghz, 2.4ghz can travel longer distance but if you live in apartment with a lot of wifi interference, your line gonna be serow

It's my home WiFI, any device that connects to it is the same, works with 2.4 but not the 5 one.

Dear TS,

let me share what I know about 5Ghz wifi, others /k also can share share
Sharing is caring.

I'm using ASUS RT-AX88U almoust (1.9K +++ few years back.)

1) not all wifi device are compatible to new 5Ghz protocol, (especially some older device)
so some new device also only support 2.4G, please refer to their manual.
2) my router 5G also giving problem gila-gila one. After power on, 5Ghz work fine, after 1 week ++++, 5Ghz fuck up. ( I dunno why)
after I power off and on again, 5Ghz work fine again.
so to resolve this I set timing to off and on 5Ghz (act like a reset). (refer to photo below.)
now everything work like what I want.


SET TIME



Difference router lain interface. refer to your router manual or provider. (don't ask me where to find set timer, don't be lazy to search.)

This post has been edited by empstar2: May 4 2025, 10:22 PM

Check if you have set data Quota on your 5Ghz?

What would help is you posting some screenshots of your router's wifi config here

no quota

the problem is it won't connect and even after connect no internet for 5Ghz, after reset, (on-off-on) all working fine.

Yes

Me too ... Certain games cant load on 5G, on 2.4G smooth saja....

My Sony TV not working with 5Ghz, No Internet connection at all. No choice but to let it connect to 2.4Ghz.

This post has been edited by nebula87: May 4 2025, 11:26 PM

Have you try changing the 5ghz wifi channel ?

Some devices will only work on 2.4Ghz if stated in the operating manual. Check the device specs.

Unless you need to specifically connect on 5Ghz, please feel free to disable it completely and rely on 2.4Ghz alone. At times, 5Ghz doesn't go well with certain devices i.e. smart gateways, smart switches etc.

Do you have a fan cooling your router?

2.4ghz wi-fi usually gives better coverage, especially when there are walls or some distance between your device and the router.

5ghz wi-fi is great for higher speeds and less interference, but it works best when your device is in the same room as the router.

is this test done in front of the Router like 5 feet away ??

possible issues.... 5g settings need optimize, OR router 5g died, i suspect this !


This post has been edited by Momo33: May 5 2025, 03:22 PM

TS, test another device (phone, tablet, laptop) see if 5Ghz work. If 5Ghz work, means your current device wifi kaput or not compatible.

This post has been edited by CPURanger: May 5 2025, 10:15 AM

the forum sub over here have technical sifus that may be able to help
https://forum.lowyat.net/NetworksandBroadband


a good app i find for troubleshoot wifi is wifiman on android, assuming ur client device is android. because then u can roam about ur home and check which has the best signal and throughput.

like others pointed out, even if u get the very latest wifi 7 router/ap, doesnt necessarily mean u can get those top speeds. its also very dependent on your client device wifi capability. maybe ur client device is old and stuck on an older wifi standard.

In that situation, if u got many of those old clients, i think a wifi 6e router is more than enough, because it's cheaper a wifi 7 router/ap last i checked.

then u got dual band, triband, quad band.... the later the most expensive. tri band is usually good enough. there is a whole article here that goes into that
https://dongknows.com/dual-band-vs-tri-band...i-fi-bandwidth/


there is simply just a lot to learn. if u check out dongknows blog he has a lot of articles that enlightens u on these things for wifi networking.


for my own setup, i have a dedicated pfsense router. my wifi is a separate access point which is a tplink eap-773 wifi 7. but for newbie like u, just getting an all in one router/wifi ap combo is ok. Just i rather have the feature of pfsense e.g. pfblocker which is why i went that route instead.

If u want to have multiple ap around the home, tplink has a good easy to configure mesh ap that comes in packs of 1-3 satelite nodes. Asus they have their AI mesh. if you search youtube for pendakwah teknologi, he explains the mesh wifi setup builds. just take note, each satelite note has a power consumption. i get by with 1 wifi ap, so depends on how big is your home for full wifi coverage to have good signal for the entire place.

also check youtube for useful info



This post has been edited by Moogle Stiltzkin: May 5 2025, 02:07 PM

if u know how to scan channel, change to less busy one.
then reduce to narrow band
sometimes is uni assignment homework answer

Sometimes WiFi router problem, I got one 2.4 ok, 5G problem. Later Telco come change it.

I am facing this problem too with my 5G wifi router. Tried reset and change channel but it will only be good for a day.

My place is a small studio.

try upgrade to better router if you are using isp router

This post has been edited by kamfoo: May 5 2025, 02:58 PM

1. If you're using 2.4 GHz, the answer is simple. The best bandwidth for 2.4 Ghz is 20 MHz.
2. If you have a 5 GHz router, consider using 20 MHz for maximizing the amount of non-overlapping channels but If you have a 5 GHz router, consider using 20 MHz for maximizing the amount of non-overlapping channels.

answer

for 5Ghz
if you set fix 20MHz you get better range but your speed drops.

most new router today can select .. 20/40/80 MHz setting
the router and dev will auto nego the best bandwidth to use.

How far u are from the router? 5Ghz is for shorter distance, if u are inside your room isolated by wall likely it's became way weaker

does it have the option to update firmware?.. try that

Hi thanks for the answer so far, to answer some common questions:

I've tried testing by standing beside my router/modem, 2.4ghz works well but 5ghz one doesn't load anything at all.

Not sure how to see the config of my router/modem.

Will try the methods in the comments section later.

I do recommend this as wild card

make it simple for ppl to help u, screenshot all wifi settings, ppl here will teach u how to config.

don't know how to see the config then post your router model or take a picture of the router bottom.

Ok i upload my experience la.

- How old is your router? (some cheap router aged 3-5 years will start having wifi issues.)

- If you are having problems connecting 5Ghz with Windows desktop/ laptop. Go to Device manager. Uninstall the Wi-Fi driver. (Do not check Attempt to remove driver). After uninstall, restart PC. It should redetect automatically and Wifi will work again.

- Download older driver from manufacturer website.

- If you have laptop & windows 10/ 11, Update BIOS. This is super risky if you do not know what you are doing and do not have patience.


SO RECENTLY...

My home 5Ghz is not present. But i could access the router settings from cable & 2.4Ghz. Neither phone, laptop or USB Wifi is able to detect 5Ghz.

So i did a Wifi survey and found there are a lot more Wifi 5ghz around my neighbourhood compared to only 3 last time. There are about 7 now.

I just adjusted the frequency manually IN ROUTER instead of AUTO. And all my wifi 5Ghz capable devices are able to see the 5Ghz SSID and get connection again.

- ASUS & TPLINK Routers have good firmware support. So you have to try updating to the latest firmware and see if it solves your problem.

- Some TP Link Router/ Mesh has Signal optimization built in. Run it one time and it solves the connection issues..

- Do not stack your router/ Mesh on top of another BTU or router or TV Box or any heat emitting device. The router performance will definitely be problematic.

2.4GHz can set at 40MHz unless you have lots of smart switches.

5GHz can set to 80MHz just to adhere to the AC standard (wireless N is too old liao... so unless if you got devices from >10 years ago, otherwise AC should be safe).

5GHz is a bit of a mix bag because there are some router which uses higher channels (3 digits) to prevent interference from neighbour router but there are also those router which prefer to stick with lower channel (36-64) which provide compatibility with older devices.

both my 2.4 and 5ghz connect just fine, maybe 5ghz connection not strong - like 2 bars only out of 5 bar but when it comes to speed, 5ghz wins cuz less interference

If rich -- use Wifi 7 -- terus can get both 2.4 and 5 -- bundle together but is too much for a home. just a get a repeater instead of one AP Router.

Since it works after rebooting, probably some problem with the 5G module. Mine was the same. I bought a better one now the whole apartment has 500Mbps coverage.

I'm not sure if I missed anything here but is this your new WiFi router or it is the device you have been using for some times.

If seems to me that you might have a faulty 5GHz section. Most module nowadays support both 2.5 and 5GHz bands. Man have built-in BT module too. If it still under warranty, then get it check by authorized service center.

Even if you just do basic setup which normally the default setting, you should get everything run smoothly.

Mine opposite
2.4G have issue with slow connection but 5.0G run like butter.
Norm both wifi don't have problem....until I realize.....fucuk HuaWei Solar inverter AP connected to my 2.4G wifi. Most probable that device hogging the 2.4G wifi bandwidth

What router are you using? Default from telco? Maybe try to get a replacement?