You can forget a Wi-Fi network on your Android device with a few taps, if you don't want your device to automatically connect ...

You can use Wi-Fi calling on your Android or iPhone to make calls using Wi-Fi rather than your cellular network.

Turning your phone's connection off and then back on is the quickest and easiest way to try and fix your signal woes. If you're moving around from one location to another, toggling Airplane mode ...