Deactivate Wi-Fi when not neededRemember, phones use a lot of battery searching for network. So keep the Wi-Fi function activated can easily depreciate your phone's battery power. Switch off Wi-Fi when you know you do not need it. A Home screen toggle will make this easy. Think of it as something boring but essential you have to do, like always putting your seat belt on.
You can go to Settings>>Wi-Fi and turn Ask to Join Networks to off.