Samsung Wi-Fi Not Detecting 5GHz — step-by-step 5 GHz band fix
Joe B.
Expert ★★★★★ 27,853 satisfied customers
Specialities: Home networking, Wi-Fi routers, dual-band & 5 GHz setup, Samsung phones & TVs, DNS & IP configuration, ISP setup
Fix “Samsung Wi-Fi not detecting 5GHz” — 5 GHz not showing, dual-band issues
Technician
First, what exactly are you using — a Samsung Galaxy phone, Galaxy tablet, or a Samsung Smart TV? And which model, if you know it?
On your home network, do you have a dual-band router with separate names for 2.4 GHz and 5 GHz (for example “Home-2G” and “Home-5G”), or is there just one Wi-Fi network name? Also, can other devices in the house (like a laptop or another phone) see the 5 GHz Wi-Fi network while the Samsung device can’t?
Finally, when you open the Wi-Fi list on your Samsung device, do you see only the 2.4 GHz network, or is the 5 GHz network visible but failing to connect with an error?
This just started recently — I used to connect to that 5 GHz network with no problem. Now it’s like 5 GHz disappeared for the phone, even when I’m standing right next to the router.
Technician
• The router’s 5 GHz band is using a channel or country setting that your phone doesn’t support (often DFS channels or a mismatched region).
• The Samsung’s Wi-Fi band preference is stuck, or there’s a bug in the Wi-Fi driver that shows up after an update.
• The router is set to weird compatibility modes (mixed security, legacy 802.11a/n only) that confuse some Samsung 5 GHz radios.
• Less commonly, there’s a hardware issue with the phone’s 5 GHz antenna, but we’ll rule out the simple stuff first.
We’ll check your Galaxy 5 GHz Wi-Fi settings on the phone, then tune the router so the Samsung Wi-Fi not detecting 5GHz situation turns into “Samsung connects to 5 GHz every time”.
I’m pretty sure this model supports 5 GHz, because I bought it partly for the faster Wi-Fi, and it used to say “Connected to 5 GHz” before. Now the phone just falls back to the slower 2.4 GHz Wi-Fi that keeps getting congested.
Technician
Step A — Samsung Wi-Fi checks on the phone
1) On the Galaxy, go to Settings > Connections > Wi-Fi, tap the three dots > Advanced (or “Intelligent Wi-Fi” depending on version). Make sure there’s no option forcing 2.4 GHz only; if there’s a “Wi-Fi frequency band” setting, set it to Auto or 5 GHz preferred.
2) In the Wi-Fi list, long-press your old 5 GHz network (if it ever shows) and tap Forget. Then also forget the 2.4 GHz version so we can reconnect cleanly.
3) Toggle Airplane mode on for 10 seconds, then off again, and reboot the phone. This resets the radios and often helps when Samsung Wi-Fi is not detecting 5GHz correctly after an update.
4) If you can, boot the Galaxy into Safe Mode briefly and check if 5 GHz appears there — that tells us whether a third-party app is interfering with Wi-Fi.
After you’ve done that, stand near the router again and tell me if the 5 GHz SSID shows up in the list at all.
Still the same: my Samsung only shows the 2.4 GHz network. The laptop right next to me sees both 2.4 GHz and “HomeWiFi-5G”, so the 5 GHz Wi-Fi network is definitely broadcasting.
Technician
Step B — Optimize 5 GHz settings so Samsung can detect it
• Log into your router’s admin page and open the 5 GHz Wi-Fi / Wireless section. Make sure 5 GHz is actually enabled and set to Broadcast SSID (not hidden).
• Give the 5 GHz network a unique name, e.g. “HomeWiFi-5G-Samsung”, so it’s easy to spot in the Samsung Wi-Fi list.
• Set Security to WPA2-Personal (AES) or WPA2/WPA3-Personal. Avoid mixed TKIP modes — Samsung phones sometimes skip 5 GHz networks with legacy encryption.
• For Wi-Fi mode, use 802.11ac or 802.11ax (Wi-Fi 5/6). For now, keep “n only” or “a only” disabled.
• Set the 5 GHz channel to a lower non-DFS channel like 36, 40, 44 or 48 with a 40 MHz or 80 MHz channel width. Some Samsung devices won’t show 5 GHz if the router is on high DFS channels (like DFS 52–144).
• Save the settings and reboot the router.
Once the router comes back up, stand close to it and refresh the Samsung Wi-Fi list a few times. See if “HomeWiFi-5G-Samsung” shows up now.
After the reboot, my Galaxy finally saw the 5 GHz Wi-Fi network, but it connected and then dropped after a minute or two. The 2.4 GHz network stays connected, but the 5 GHz one keeps disappearing from the list and coming back.
Technician
Step C — Tune Samsung Wi-Fi behavior for 5 GHz
1) On the Galaxy, go to Settings > Connections > Wi-Fi > ⋮ > Advanced / Intelligent Wi-Fi. Turn off options like Switch to mobile data, “Turn on Wi-Fi automatically” and any aggressive Wi-Fi power-saving toggles. These can make 5 GHz drop first.
2) Tap your 5 GHz network, then Manage network settings (or similar) and disable Randomized MAC for that SSID. Some routers handle Samsung’s randomized MAC poorly on 5 GHz.
3) Go to Settings > General management > Reset > Reset network settings and confirm. This clears old Wi-Fi, Bluetooth and mobile configs that may conflict with 5 GHz.
4) After the reboot, connect only to “HomeWiFi-5G-Samsung” while you’re next to the router and test for a few minutes — browsing, streaming a video, and watching whether the 5 GHz icon stays solid.
If 5 GHz is stable right next to the router but drops in other rooms, that points more to 5 GHz range and interference, which we can fix next.
But when I walk to the bedroom, the 5 GHz network often disappears or the phone switches back to the 2.4 GHz network. Is that just how 5 GHz works, or is there anything else to tweak?
Technician
• 5 GHz Wi-Fi has higher speed but shorter range. It struggles more through thick walls, floors, and metal than 2.4 GHz, so it’s normal for 5 GHz to fade where 2.4 GHz still works.
• Make sure the router is in an open, central spot — not in a cabinet, on the floor, or behind a TV. Raising it up and clearing obstacles can extend the 5 GHz coverage to where the Samsung device is used most.
• Stick with a moderate channel width like 40 MHz or 80 MHz. Very wide 160 MHz channels can be more sensitive to interference and cause flaky 5 GHz behavior on some phones.
• If you have many rooms to cover, consider a mesh Wi-Fi system or an extra access point so the Samsung phone always has a strong 5 GHz signal nearby instead of falling back to 2.4 GHz at the edges.
From what you’ve described, the phone itself and the router’s 5 GHz band now work correctly — we’re mainly dealing with coverage and placement from here.
If I leave things as they are, is it fine that my Samsung phone uses 5 GHz near the router and 2.4 GHz further away, or should I separate them more?
Technician
Step D — Keep Samsung 5 GHz Wi-Fi fast and predictable
• Keep your 5 GHz network as the “fast lane” (HomeWiFi-5G-Samsung) for your Galaxy phones, tablets, and newer devices when you’re close to the router.
• Leave the 2.4 GHz network as a backup for longer distances and smart home gadgets that don’t support 5 GHz.
• On Samsung phones, leave the Wi-Fi band setting on Auto so they can pick 5 GHz when it’s strong and gracefully drop to 2.4 GHz when you’re far away.
• Check your router’s firmware updates every so often — many updates specifically improve 2.4/5 GHz stability and compatibility with phones and TVs.
• If you add a Samsung Smart TV or another Galaxy device later, use the same approach: connect to 5 GHz where possible for streaming, and fall back to 2.4 GHz only when the 5 GHz signal is weak.
With your current settings, your “Samsung Wi-Fi not detecting 5GHz” problem is essentially resolved — now it’s just about getting the best mix of speed and coverage.
I’m happy the Samsung Wi-Fi 5 GHz network is showing again and not randomly disappearing. Thanks for walking me through the settings on both the phone and the router.
Technician
Summary: To fix a Samsung Wi-Fi not detecting 5GHz issue, confirm the Galaxy or Samsung TV supports 5 GHz, enable and broadcast a clearly named 5 GHz SSID on the router, use supported lower channels (36–48) with WPA2/WPA3, reset Samsung network settings, and turn off aggressive power-saving or “intelligent” Wi-Fi features that cause band hopping. Once 5 GHz is stable near the router, fine-tune placement or add mesh nodes to extend coverage.
If this ever crops up again — 5 GHz not showing, Samsung stuck on 2.4 GHz, or random drops — you can always open a chat with an expert and we’ll trace it live with you.
Technician
Quick answer: the accepted fix
Accepted fix when Samsung Wi-Fi is not detecting 5GHz: confirm the Samsung phone or TV supports 5 GHz, enable and broadcast a separate 5 GHz SSID on the router, use a supported lower channel (36–48) with WPA2/WPA3, reset Samsung network settings, and adjust router placement so the 5 GHz signal is strong where you use the device.
Why Samsung devices stop seeing 5GHz Wi-Fi (bands, channels, interference)
Most Samsung Wi-Fi not detecting 5GHz cases are caused by a mismatch between the router’s 5 GHz settings and what the Samsung device supports, not by a completely “broken” phone. If the router uses DFS channels, legacy security, or odd mixed-mode settings, a Galaxy phone or Samsung Smart TV may simply hide that 5 GHz network while laptops still see it.
On top of that, 5 GHz Wi-Fi has shorter range than 2.4 GHz and is more easily blocked by thick walls and cabinets. That’s why a Galaxy phone might show 5 GHz only near the router but fall back to 2.4 GHz farther away. Using a unique 5 GHz network name, supported channels, modern security (WPA2/WPA3), and good router placement usually restores a stable 5 GHz signal on Samsung phones, tablets and TVs.
How to tell if missing 5GHz is a Samsung, router, or coverage issue
To narrow down a Samsung 5 GHz Wi-Fi not showing problem, start with a few quick comparisons:
First, stand next to the router and see if other devices can see the 5 GHz network. If they can but your Samsung can’t, it’s likely a Samsung settings or compatibility issue. If no device sees 5 GHz, check the router — 5 GHz may be disabled or on an unsupported channel. If the Samsung sees 5 GHz only when close, then drops to 2.4 GHz in other rooms, you’re mainly dealing with 5 GHz coverage and interference, which can be improved by moving the router, adding a mesh node, or adjusting channels and power.
Samsung Wi-Fi not detecting 5GHz — quick troubleshooting tips
Make 5 GHz visible again: fix router bands, channels and Samsung Wi-Fi settings.
Fast path: confirm your Samsung phone or TV supports 5 GHz → log into the router and enable a clearly named 5 GHz SSID → set channels 36–48 with WPA2/WPA3 security → reset Samsung network settings and disable aggressive Wi-Fi power saving → test close to the router, then improve placement or add mesh if 5 GHz still drops at a distance.
Disclaimer: This information is AI-generated and intended for general guidance only. For advice specific to your Samsung model, router brand, and ISP, please consult a verified expert on Whizz-Tech before making decisions.
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FAQ
Why can’t my Samsung phone detect my 5 GHz Wi-Fi network?
A Samsung Wi-Fi not detecting 5GHz issue usually means the router’s 5 GHz band is using settings the phone doesn’t like — for example DFS channels, hidden SSID, or legacy security — or the signal is too weak where you’re standing. Make sure 5 GHz is enabled and broadcasting, use lower channels (36–48) with WPA2/WPA3, reset Samsung network settings, and test again near the router.
How do I get my Samsung phone to connect to 5 GHz Wi-Fi?
First, confirm your Galaxy model supports 5 GHz. Then log into your router and enable a separate 5 GHz SSID with a unique name and WPA2/WPA3 security on channels 36–48. On the Samsung phone, reset network settings, turn off aggressive power-saving Wi-Fi options, and connect directly to the 5 GHz network while near the router. Once that’s stable, you can tweak placement and coverage so 5 GHz stays available where you use the phone most.
Do all Samsung phones and TVs support 5 GHz Wi-Fi?
No. Most recent mid-range and flagship Samsung Galaxy phones and many newer Samsung Smart TVs support 5 GHz, but some older or budget models are 2.4 GHz only. If your device never sees any 5 GHz network even next to the router while other devices do, check the official specs on Samsung’s website or the user manual to confirm whether 5 GHz Wi-Fi is actually supported.
When should I replace my router for better Samsung 5 GHz Wi-Fi?
If you’ve enabled 5 GHz, picked supported channels, updated firmware, and reset your Samsung network settings but 5 GHz Wi-Fi is still unstable or missing, your router may simply be too old or underpowered. Upgrading to a modern Wi-Fi 5 or Wi-Fi 6 router with strong 5 GHz radios, good dual-band support, and current firmware often makes Samsung phones and TVs connect to 5 GHz more reliably, especially in busy homes.
Sources
- Samsung — What to do if the Wi-Fi network is not detected
- Samsung — TV or projector has problems connecting to the internet
- TechGenyz — How to fix 5 GHz Wi-Fi not showing up
Filed under: Internet & Wi-Fi Troubleshooting
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