When your Android 11 device experiences connectivity issues due to an expired or faulty IP address, renewing the IP quickly can restore your network access without needing to restart the device or reset network settings. One of the simplest methods is to toggle airplane mode on and off—this forces your device to disconnect from the network and reconnect, which often triggers a new IP assignment from the router. Go to the quick settings panel, tap the airplane mode icon to enable it, wait five seconds, then disable it again. This method works reliably because it resets the entire wireless interface.

Another effective technique is to forget and reconnect to your Wi-Fi network. Navigate to Settings, then Network and Internet, and select Wi-Fi. Tap the network you are connected to, and choose Forget. After that, reconnect by selecting the network from the list and entering the password again. This process prompts the router to assign a fresh IP address.

If you have access to your router's admin interface, you can manually release and renew the IP address from there. Log in to your router using a browser, locate the DHCP client list or connected devices section, find your Android device by its name or MAC address, and select the option to release or renew its IP. While this requires a second device, it is the most direct method.

You can also use a third-party app from the Google Play Store designed for network troubleshooting. Apps like Network Analyzer or IP Tools allow you to manually release and renew your IP without toggling settings manually. These tools often provide additional features such as ping tests and DNS lookups to help diagnose deeper issues.

Finally, if none of the above steps work, try restarting your router. Unplug it from power, wait for at least 30 seconds, then plug it back in. Once it boots up and reconnects to the internet, your phone will request and receive a fresh DHCP lease. This step clears any temporary glitches on the router side that might be causing IP assignment problems.

For regular users experiencing frequent IP issues, consider setting a static IP address on your Android device. This prevents the device from relying on dynamic DHCP assignments. To do this, go to your Wi-Fi settings, tap the connected network, select Modify Network, switch to Advanced Options, and change IP Settings from DHCP to Static. Then manually enter an IP address outside the router's DHCP range to avoid conflicts.

Regularly updating your Android device and router firmware also helps prevent IP renewal problems, because patches resolve known DHCP and Wi-Fi issues. By combining these methods, you can maintain stable connectivity and resolve IP issues quickly.