• Restart iPhone

    Press and hold your iPhone's power button until the Power off slider appears. If you're using an iPhone without a home button, you'll need to press and hold the volume and either side button.

    Once the power off slider appears, drag it to your right side to turn the device off. To turn your iPhone on again, you'll need to press and hold the power button until the Apple logo appears.

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  • Restart network device

    You can unplug the router for a few seconds and then plug it in again to see how it pans out.

    This method solves the issue quickly, but if the internet is still not responding, you need to use other methods.