Wi-Fi 7 Won't Connect Old Devices: Why and How to Fix It

You bought a shiny new Wi-Fi 7 router from Netgear, TP-Link, or Asus. Most of your devices connected fine. Then your wireless printer, an older Ring doorbell, or that smart plug in the garage refused to play along. This is a common story in 2026, and the cause is rarely the router itself. The way Wi-Fi 7 was rolled out introduced several settings that quietly break older hardware.

The good news is that almost every problem here has a fix. Most of them take three minutes in the admin panel. You don't need to replace the device that stopped working, and you don't need to return the router. You just need to know which settings to turn off and why.

The WPA3 Problem

This is the biggest one. Most Wi-Fi 7 routers ship with WPA3-only encryption turned on by default. Devices that came out before 2019 or so don't know what WPA3 is. They look for WPA2, find nothing, and report "can't connect to network" or "wrong password" even when your password is correct.

The fix is to switch your router into WPA2/WPA3 mixed mode. On a Netgear Nighthawk RS700 series, log in at the 192.168.1.1 login page, then go to Wireless > Security Options and pick WPA2-PSK [AES] + WPA3 Personal. On TP-Link Archer BE models, the setting lives under Wireless > Wireless Security. Asus places it under Wireless > General > Authentication Method, where you want WPA2/WPA3-Personal mixed.

Some routers separate the bands. You can leave 6 GHz on WPA3-only and put 2.4 GHz on WPA2/WPA3 mixed. That keeps the new band fast and lets old gear find the older bands. This is usually the cleanest setup.

The 6 GHz Band Is Invisible to Old Devices

Old phones, laptops, and IoT devices can't see the 6 GHz band at all. The chipset doesn't support it. The driver doesn't speak it. The band exists, but for those devices the network might as well not be there.

This becomes a problem when your router uses a single network name for all bands, also called band steering or Smart Connect. The router decides which band to send each device to. If the router thinks a device should go to 6 GHz and that device can't see it, the device just fails to connect.

The fix is to split your network into separate SSIDs. Give 2.4 GHz, 5 GHz, and 6 GHz their own names like "Home_24", "Home_5", and "Home_6". Connect old devices manually to the 2.4 or 5 GHz network. New phones and laptops can use the 6 GHz one. This sounds clunky, but it eliminates a lot of connection failures.

MLO Conflicts With AiMesh and Some Apple Devices

Multi-Link Operation lets a single device use two or three bands at the same time for higher throughput. It's the headline feature of Wi-Fi 7. It also causes problems in two specific situations.

The first is Asus AiMesh. If MLO is on at the main router, AiMesh nodes that don't support MLO can stop broadcasting 6 GHz. The mesh still works for older bands, but you lose the speed advantage of the new band on satellites. The workaround is either to use only MLO-capable nodes or to disable MLO if your mesh nodes are older.

The second is some Apple devices. The Wi-Fi chipset in certain iPhones and iPads has trouble with MLO under specific conditions, and the connection drops repeatedly. Apple and the router makers have been working on this since late 2025. If you have an iPhone that keeps falling off your new Wi-Fi 7 network, try turning MLO off as a test. If that fixes it, leave MLO off until firmware catches up.

2.4 GHz Channel Width Issues

Some Wi-Fi 7 routers default to 40 MHz channel width on 2.4 GHz. Old IoT gear, smart plugs, ESP32-based devices, and older Ring or Wyze cameras often need 20 MHz. They simply don't connect at 40 MHz.

Drop your 2.4 GHz channel width to 20 MHz in the wireless settings. You won't notice a speed difference for the kind of devices that live on 2.4 GHz. They were never fast anyway. What you'll get is reliable connection for cheap smart home gear.

WPS Is Gone or Hidden

Many new Wi-Fi 7 routers ship with WPS disabled by default or removed entirely. A lot of old printers and IoT devices expect WPS as their primary setup method. If you press the WPS button and nothing happens, the feature is probably off in firmware.

You can usually turn WPS back on temporarily in the admin panel under Wireless > WPS or Advanced > WPS. Pair your device, then turn WPS off again. Leaving WPS on full-time is a known security risk, so the temporary approach is the right way to handle it.

What to Check Before You Buy a Wi-Fi 7 Router

If you haven't upgraded yet, a quick inventory helps you avoid headaches. List the devices that absolutely have to work after the swap. Printers, security cameras, smart speakers, garage door openers, and older laptops are the usual suspects. Note when each device was released. Anything from before 2019 may need workarounds.

Check your router's manual or the manufacturer's website for these specific features. You want band-specific SSID support, WPA2/WPA3 mixed mode per band, and the ability to turn MLO on and off. If a router only allows a single SSID across all bands with WPA3 forced on, you're going to have problems.

When It's Actually the Router

Sometimes the router is at fault. Early Wi-Fi 7 firmware from late 2024 and early 2025 had bugs that have since been patched. If your router was made before mid-2025, check for a firmware update before you start changing settings. Asus, Netgear, and TP-Link all push updates through their apps.

If you're still stuck after the firmware update, factory reset the router and set it up again from scratch. Carried-over settings from a backup can sometimes confuse the radio configuration on new firmware. A clean setup with the recommendations above usually clears the last of the connection problems.

To rule out an ISP issue, run our speed test from a device that does connect. A working connection on one device with failures on another is almost always a wireless configuration issue, not an internet problem.

Some devices truly are at end of life. A 2014 smart bulb running ancient firmware may simply not work with any modern router setup. At that point, replacement is the only answer. Before you give up, though, try the WPA2/WPA3 mixed mode and 2.4 GHz at 20 MHz combo. That covers about 90 percent of the cases people complain about.

For default credentials when you're setting things up fresh, our default router password list covers most current Wi-Fi 7 models from major brands.