For various reasons, your iPad or iPhone may not connect to WiFi. If you are experiencing Wi-Fi connection problems from iOS devices, here are some suggestions on how to take action.
Are you within range of the router?
First of all, make sure that you are actually within range of the router and that the router is turned on. If we are too far from the router it is not possible to receive the signals; the range of WiFi is determined by various factors, including the type of router used, the type of connection used, the presence of obstacles (e.g. walls) and devices that affect the operation of the network. Obviously you just have to move from one room to another or from one floor to another in the house to check the strength of the signal.
Check that Wi-Fi is on and that the network is visible
Select Settings> Wi-Fi and check if Wi-Fi is on. Touch the name of the Wi-Fi network to log in. The blue check mark next to a network indicates that we are connected to that network. If you see "Automatic login disabled" under our Wi-Fi network name, tap and turn on "Automatic login".
If prompted, enter the Wi-Fi password
If prompted, enter the password for the Wi-Fi network. Sometimes, if you enter the correct password, the message “Unable to access the network” or “Wrong password” may appear. Restart all your devices (iPad, iPhone, router, extender, etc.), wait for the signal to become available and try to enter the password again.
If there are problems with the WiFi network ...
If iOS detects a Wi-Fi connection problem, we may see a wireless connection message under the name of the Wi-Fi network we're connected to. For example, a message like: “No Internet Connection”. This message indicates that the connection with the WiFi router has occurred but the latter is unable to activate the connection.
First of all it is necessary to check on the router if the ADSL signal is detected; it is usually enough to check that the relative LED lights up: if it is off or flashing, disconnect all the devices connected to the system (telephones, fax machines, answering machines, etc ...) leave only the modem connected and check again that the ADSL LED is on steady. If we continue to have problems, it could be a momentary failure; you can wait or open a fault report with the manager.
Restart all devices
A trivial attempt worth trying when we fail to connect is to restart the iOS device, router, and cable or DSL modem. To restart the router or modem, you typically just need to unplug the cable from the power supply, wait about ten seconds and then plug it back in. After restarting each device, you have to wait for the signal to arrive and try again.
I still can't connect ...
If after all of the above, you still can't connect, you can try resetting your network settings. Just go to Settings> General> Reset and choose "Reset Network Settings". Warning: this will also reset passwords and Wi-Fi networks, cellular network settings and any VPN and APN settings.
Other attempts
Are there any apps to check the WiFi signal?
Certainly. There are various apps that allow you to check the intensity expressed in dBm. Dr. Wifi: speed & signal test for example, allows you to perform the mirusration of the bandwidth and speed of the LTE and Wi-Fi networks, identifying the points where the signal is more possible. Apps of this type are useful for taking note of the values and obtaining quantitative data starting from which to develop any changes to your network.