getting a 'something went wrong' error in the google home app when trying to set up from scratch

Diagnosis

The "Something went wrong" error during the Google Nest WiFi Pro (6E) setup is a generic provisioning failure. This occurs when the Google Home app loses the handshake with the router's temporary setup SSID or fails to authenticate the device's MAC address with Google's cloud servers. Because the Nest WiFi Pro utilizes the 6GHz band and updated WPA3 security protocols, any interference or permission mismatch in the mobile device's OS can break the setup chain. Specifically, this usually happens during the "Connecting to your network" or "Updating" phase. It is often caused by a "zombie" session where the app thinks a device is already partially configured, or by the phone's "Adaptive Connectivity" or "Smart Network Switch" features, which automatically disconnect from the router's temporary setup signal because it lacks internet access, causing the app to time out and throw the error. You can confirm this if the router's LED is pulsing white (ready for setup) but the app hangs for more than 30 seconds before the error appears.

How to Fix It

To resolve this, you must perform a hard state reset and clear the communication path between your mobile device and the hardware.

1. Perform a factory reset on the Nest WiFi Pro unit. Locate the reset button on the bottom of the device. Press and hold it for exactly 10-15 seconds. The LED will flash and eventually settle into a pulsing white light, indicating it is back in discovery mode.
2. Force-stop the Google Home app on your smartphone. On Android, go to Settings > Apps > Google Home > Force Stop. On iOS, swipe up from the bottom of the screen and flick the app away.
3. Clear the app cache. On Android, go to Storage > Clear Cache. On iOS, uninstall and reinstall the app to ensure all temporary setup files are purged.
4. Disable "Mobile Data" in your phone settings. This prevents the phone from jumping back to 5G/LTE when it detects that the Nest WiFi Pro's temporary setup signal doesn't have an active internet connection.
5. Ensure "Precise Location" is toggled ON in your phone's permission settings for the Google Home app. Without precise GPS coordinates, Google cannot verify the regulatory domain for 6GHz operation, which will trigger a setup failure.
6. Power cycle your modem. Unplug the modem for 60 seconds, plug it back in, and wait for a solid "Online" light before connecting the Nest WiFi Pro via the WAN port.
7. Restart the setup process in the Google Home app, keeping the phone within 3 feet of the router until the "Your network is ready" message appears.

If That Didn't Work

• Try a different mobile device. If you are using an older Android or iOS device that does not support Wi-Fi 6E or WPA3, the handshake can fail during the security negotiation phase. Using a newer flagship device for the initial setup often bypasses the "Something went wrong" loop.
• Swap the Ethernet cable. Use a known-working Cat6 or Cat6a cable between the modem and the Nest WiFi Pro. A degraded Cat5e cable can cause intermittent packet loss during the firmware update phase of setup, which the app reports as a generic error.
• Check for a MAC Address conflict. If you are using a modem/router combo from your ISP, put the ISP device into "Bridge Mode." If the ISP device is trying to assign an IP address via DHCP while the Nest WiFi Pro is also attempting to manage the network, a collision occurs that halts the provisioning process.
• Change the power outlet. Plug the Nest WiFi Pro directly into a wall outlet rather than a surge protector or power strip. Some high-sensitivity power strips can cause slight voltage drops that lead to boot-looping or unstable wireless radios during the high-power draw of the initial setup phase.

Heads Up

• Avoid placing the router inside a cabinet or behind a TV during setup; the 6GHz signal is extremely sensitive to physical obstructions and can cause the app to lose connection during the final configuration.
• Keep your phone's software updated to the latest OS version. Google frequently pushes updates to the Home app that require the latest security patches in Android or iOS to function.
• Do not interrupt the "Updating" phase. The Nest WiFi Pro often downloads a large firmware update immediately after setup. If you unplug the device or close the app during this process, you will likely encounter the "Something went wrong" error again and will have to factory reset.
• If you are using a VPN on your phone (like Google One VPN or NordVPN), disable it completely before starting the setup, as it masks your IP and prevents the app from communicating with the local hardware.