Wi-Fi 6 Device Connecting at Wi-Fi 5 Speeds? Fixes

Why a Wi-Fi 6 client can show up as 802.11ac

Seeing 802.11ac in the connection details means the radio link is using Wi-Fi 5, not Wi-Fi 6. The Wi-Fi Alliance describes Wi-Fi 6 as a generation introduced in 2018 with OFDMA, multi-user MIMO, 160 MHz channel capability, target wake time, 1024 QAM, and transmit beamforming. When a client connects as 802.11ac, it is not negotiating those Wi-Fi 6 features.

This can happen because the router does not support Wi-Fi 6, the wireless mode is set to an earlier standard, the client is joining a band or SSID with the newer mode disabled, or a driver or firmware setting is forcing compatibility mode. Before changing settings, confirm the router generation and then check the band, channel width, and security settings below.

• The router itself only supports Wi-Fi 5.
• The wireless mode is set to 802.11ac or legacy-only.
• The client joined a band or SSID where Wi-Fi 6 is disabled.
• Security settings force a compatibility mode.
• Router firmware or client drivers are out of date.

Confirm the router and client support Wi-Fi 6

Before changing settings, verify the equipment. Look for a Wi-Fi 6 logo, a Wi-Fi CERTIFIED 6 label, or 802.11ax in the specifications. The Wi-Fi Alliance lists Wi-Fi 5 as a separate generation introduced in 2014, so a Wi-Fi 6 client on a Wi-Fi 5 router will connect at Wi-Fi 5 no matter what you do. If the router only supports 802.11ac, 802.11ac is the highest common standard and the client will use it.

Check the client as well. A phone, laptop, or tablet made before Wi-Fi 6 may be Wi-Fi 5 only. For a Wi-Fi 6E client, confirm the router also supports the 6 GHz band if you expect to use it. The Wi-Fi 6 explained and Wi-Fi 6E explained articles can help you tell the generations apart.

Check the wireless mode and band

Log into the router admin page and open the wireless settings for each radio. Look for a mode setting that lists 802.11ax, 802.11ac, 802.11n, or Auto. If the 5 GHz radio is set to 802.11ac, set it to 802.11ax or Auto so the router can negotiate the newer standard. Some routers also have a separate Wi-Fi 6 mode toggle or options for OFDMA and MU-MIMO that should be enabled. See How to Log In to Your Router's Admin Page if you cannot find the settings.

Then confirm which SSID and band the client joined. Wi-Fi 6 can operate on the 2.4 GHz and 5 GHz bands, and a Wi-Fi 6E router adds the 6 GHz band. If your router broadcasts separate SSIDs for each band, a client that joins the legacy 2.4 GHz SSID may connect with 802.11n or another older mode. Forget that network and join the SSID tied to the Wi-Fi 6 radio, or use a single SSID with band steering if the router supports it.

Widen the channel width where possible

Channel width does not change the generation from 802.11ac to 802.11ax, but it does affect the negotiated link speed once the standard is correct. Wi-Fi 6 includes 160 MHz channel utilization capability, which is one of the features that can make a client show a higher PHY rate. If the router is currently set to 20 or 40 MHz on the 5 GHz band, try moving to 80 or 160 MHz when the environment is not crowded.

Conversely, in a dense apartment building, a very wide channel can pick up more interference and cause the router and client to fall back. A stable 80 MHz channel may be better than a constantly disconnecting 160 MHz link. Review Wi-Fi Channel Widths Explained and How to Enable 160 MHz Wi-Fi Channels for the exact steps.

Review the security settings

Security can interfere with standard negotiation. The Wi-Fi Alliance states that WPA3 is mandatory for Wi-Fi CERTIFIED devices, disallows outdated legacy protocols, and requires Protected Management Frames. On many routers, the default security mode is WPA2/WPA3 transition or WPA3-Personal. If an older client cannot complete WPA3 negotiation, it may fall back to a mode that also affects the radio standard. Try switching to WPA3/WPA2 mixed mode first, then to WPA3-Personal if every device on the network supports it.

Do not confuse security with the radio standard. A WPA2 network can still be Wi-Fi 6, but compatibility modes and older drivers sometimes make negotiation less reliable. Check the router wireless security section and compare it with what the client supports. The WPA2 vs WPA3 article and How to Enable WPA3 on Your Router show where these settings live.

Update firmware and drivers

Router firmware updates can change default wireless modes, add Wi-Fi 6 fixes, improve 160 MHz stability, and correct WPA3 compatibility problems. Check the router maker support page for the latest firmware and apply it through the admin interface. See Router Firmware Updates Explained and How to Update Router Firmware Safely for general advice.

Client devices also matter. A phone or laptop needs a wireless driver that supports 802.11ax. Operating system updates sometimes change how a device reports the connection, so make sure both the OS and the wireless adapter driver are current. If the client cannot negotiate WPA3, update its driver before changing the router security mode.

If it still shows 802.11ac

After those checks, try a clean reconnect. Forget the Wi-Fi network on the client, restart the router, and then reconnect. Move the device closer to the router to rule out range-related fallback. Test with a second Wi-Fi 6 client if you have one; that tells you whether the issue follows the router or the first client.

Some older Wi-Fi 6 clients, especially in the first wave, have drivers that prefer 802.11ac on certain routers. In that case, the practical fix is to wait for a driver update or use a different client. If you are shopping for a new router, the Best Wi-Fi 6 Routers in 2026 and Best Wi-Fi 6E Routers in 2026 guides list models by specs.

• Verify the connected band in the router client list.
• Try the other band, such as 5 GHz instead of 2.4 GHz, or 6 GHz if available.
• Change the security mode from WPA3-only to WPA3/WPA2 transition.
• Reset the wireless settings on the router to defaults if a previous change stuck.
• Test with a laptop or phone that you know supports Wi-Fi 6.

What to pick for your use

Questions

Why does my phone show 802.11ac when I am connected to a Wi-Fi 6 router?

The client and router have negotiated 802.11ac instead of 802.11ax. Check the wireless mode, band, security setting, and firmware. If any of those forces compatibility, Wi-Fi 6 features such as OFDMA, MU-MIMO, and 160 MHz channels are not used on that link.

Does WPA2 force a Wi-Fi 6 client to connect at Wi-Fi 5 speed?

Not by itself, but a WPA2-only network can prevent WPA3 negotiation. Wi-Fi Alliance says WPA3 disallows outdated legacy protocols and requires Protected Management Frames. When an older client cannot complete WPA3, the router may fall back to a mode that also affects the radio standard. Use WPA3/WPA2 transition mode for compatibility.

What channel width should I set for Wi-Fi 6?

Wi-Fi 6 supports 160 MHz channel utilization capability, so try 80 or 160 MHz on the 5 GHz band when the area is not crowded. In dense neighborhoods, a narrower channel may be more stable because it picks up less interference. Start with 80 MHz and move up if you need more throughput.

Can a Wi-Fi 6 client connect at Wi-Fi 6 speed to a Wi-Fi 5 router?

No. The router must support Wi-Fi 6 for the client to negotiate 802.11ax. If the router only supports 802.11ac, the client will connect using the highest common standard, which is Wi-Fi 5.

Why is the 6 GHz band not showing up?

The router must be a Wi-Fi 6E or Wi-Fi 7 model with the 6 GHz radio enabled, and the client must also support 6 GHz. If both do, check the router band settings, update firmware, and make sure the client is close enough to the router to see the 6 GHz SSID.