How do old devices stay connected even after changing the Wi-Fi password? Check these settings.

Old devices can remain connected even after you change your Wi-Fi password. Find out why this happens and which router settings you should check to secure your network.

It is generally assumed that all old devices will disconnect from the network after the home Wi-Fi password is changed. However, this doesn't always happen. The situation differs because smartphones, laptops, smart TVs, and other devices often have the old network details saved. Additionally, certain router settings can make it easier for old devices to reconnect.

What happens after changing the password?

Normally, when you change your router's Wi-Fi password, devices connected using the old password should lose their connection. The device would then require the new password. If a phone or laptop has the old network information saved, it won't be able to reconnect to the internet without the new password. However, some devices retain the network profile; in such cases, the device continues to recognize the Wi-Fi network and may prompt you to enter the new password.

Is WPS enabled?

You should also check your router's WPS (Wi-Fi Protected Setup) setting. WPS allows multiple devices to connect to the network without typing in the Wi-Fi password. If WPS is active on your router and an old device was previously paired using it, this could pose a security risk. Therefore, visit your router's admin panel and check the WPS option; it is generally best to keep it turned off if you don't need it.

"Remembered Networks" could also be the reason.

Phones and computers save Wi-Fi network details—often referred to as "Saved Networks" or "Remembered Networks." Even after the password changes, the network name remains visible on the device. If you want to prevent an old device from connecting automatically in the future, go to that device's settings and select "Forget" for the Wi-Fi network. You will then need to enter the new password to reconnect it.

Check the 'Connected Devices' list on your router

If you suspect that an old or unrecognized device is still using your Wi-Fi, check the router's admin panel for options like 'Connected Devices,' 'Client List,' or 'Device List.' Here, you can find details about the devices connected to the network.

If you spot an unknown device, block its connection immediately and change your Wi-Fi password. It is also wise to change the router's admin password.

Check your Wi-Fi security settings

Simply changing the password isn't enough. Use advanced security protocols like WPA2 or WPA3 on your router. If an outdated or weak security mode is active, it is best to switch to a more secure one. Additionally, ensure your Wi-Fi network name and password are strong; avoid using just your mobile number, name, or simple words for the password.