First we must try is to restart our device in conjunction with the router associated with our Wi-Fi connection, disconnecting the router for at least one minute. It is also advised to do the same with the modem, and ensure that both have the most current firmware to date.
If these simple fixes do not work, it's time to go to the device settings and once there to force the phone or tablet to forget the Wi-Fi network, to do this click on the network and immediately we will get a pop-up window where you can erase it. Another adjustment with which we can play is to change the frequency pressing the three vertical dots to go to the Advanced menu.