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Yes. A Wi-Fi 6 router can generally connect to older devices that use 2.4 GHz Wi-Fi, provided the router and device support compatible Wi-Fi modes and settings. Wi-Fi 6 is 802.11ax and works on both 2.4 GHz and 5 GHz; an older device connects using the Wi-Fi standard it supports, rather than gaining Wi-Fi 6 capabilities.
Why older 2.4 GHz devices can connect
Wi-Fi 6 is the common name for 802.11ax, a Wi-Fi generation that can operate on 2.4 GHz as well as 5 GHz. The Wi-Fi Alliance says in its Wi-Fi 6 Deployment Guidelines and Scenarios that Wi-Fi 6 supports devices on both bands and that older 802.11a/b/g/n/ac devices can coexist with Wi-Fi 6 devices.
That compatibility is not a promise that every device will connect under every configuration. The router must have its 2.4 GHz radio enabled, and the client’s supported Wi-Fi modes and security requirements must work with the router’s settings.
What compatibility does—and does not—mean
An older smart plug, printer, or other Wi-Fi client does not become a Wi-Fi 6 device when it connects to a Wi-Fi 6 router. It continues to use the Wi-Fi standard and capabilities built into the client. The Wi-Fi Alliance specifically cautions that a Wi-Fi 6 access point does not improve the performance or range of legacy 802.11a/b/g/n/ac clients simply by being Wi-Fi 6.
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
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Wi-Fi 6E is a separate extension that adds the 6 GHz band. A client needs Wi-Fi 6E/6 GHz support to use that band; a 2.4 GHz-only device does not need Wi-Fi 6E and can remain on a compatible 2.4 GHz network.
How 2.4 GHz compares with 5 GHz and 6 GHz
| Band | Compatibility | Range and obstacles | Speed and congestion |
|---|---|---|---|
| 2.4 GHz | Used by many older and smart-home devices; Wi-Fi 6 can also operate on it. | Typically reaches farther and passes through obstacles better than 5 GHz. | Generally offers lower throughput and has fewer non-overlapping channels, so congestion can be greater. See Microsoft’s Wi-Fi and home-layout guidance. |
| 5 GHz | Available on Wi-Fi 6 routers; a client must support the band to use it. | Typically has less range and poorer wall penetration than 2.4 GHz. | Can offer higher throughput, though real-world performance depends on conditions and the client. |
| 6 GHz (Wi-Fi 6E) | Requires a client that supports Wi-Fi 6E and 6 GHz. | Has shorter range than lower bands; permitted channels and availability depend on local rules. | Not necessary for 2.4 GHz devices to connect. |
What to check if a device will not connect
- Check the exact specifications. Confirm that the router supports 2.4 GHz and consult the device manual for its supported bands and Wi-Fi standards. ASUS recommends checking the specifications for the particular product; capabilities can differ between models. See ASUS’s Wi-Fi 6 and Wi-Fi 6E overview.
- Make sure 2.4 GHz is enabled. Router settings vary: some routers show one network name (SSID) for multiple bands, while others show a separate name for each. If bands share a name, a device or operating system may select a band automatically. Microsoft describes this behavior in its home Wi-Fi guidance.
- Review security and other router settings. The device’s supported security configuration must be compatible with the router’s configuration. Check the device and router documentation for supported options; compatibility is not guaranteed for every combination of older client and settings.
- Check channel and regional support. Permitted Wi-Fi channels vary with local rules, and router specifications may differ by region. For channel-related details, consult the model documentation and ASUS’s regional channel guidance.
- If it connects but performs poorly, look beyond compatibility. Distance, walls, interference, other clients sharing airtime, and the device’s own capabilities can affect performance. TP-Link lists these as factors in its Wi-Fi speed troubleshooting guidance. A slow connection alone does not establish that the device is defective.
Do you need a new router?
No—not solely because a device uses 2.4 GHz. If your current router provides a compatible 2.4 GHz network and the device connects successfully, compatibility does not require an upgrade. If you are already replacing a router, check the exact model’s band support and the requirements of your devices; Wi-Fi 6 is not itself a reason to expect faster performance from an older client.
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