Connecting to WiFi

That means that your iPhone shouldn't have any hardware failure.

If the issue still persists at home only, most likely the problem is there.

Even if you have already tried the steps provided in this support guide, please try to retrace them all:--> If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network - Apple Support

Be careful, when you restart your modem-router, turn it off for at least 5 minutes, unplugging it from power, before turning it back on. Check also if there's a firmware update for your router, contacting their manufacturer.

Here you can find also some modem-router settings to check:--> Recommended settings for Wi-Fi routers and access points - Apple Support

Regards

Giulio

Try selecting the Other network. Type in the network name and password. For security try both WPA and WPA2 first. Once you are able to connect, update your iOS version to the latest to avoid getting problems like this again.

Does your iPhone connect to different wifi netwoks?

Should be this case, restart your modem-router, ther retry to connect your device.

Regards

Giulio