There are several cases in which our Wi-Fi connection can give problems.
Sometimes it is not enough to turn the router off and on.
Sometimes, you have to go to the terminal settings (eg, in the section 'IPv4 address') and in other settings to the router itself.
What are the Different Reasons?
Connecting to the wifi of a home (or someone close to you) sometimes gives problems that many are not able to solve. That a message of 'Obtaining IP address...' appears and does not disappear, the wifi symbol in gray or that the connection is saved, but does not connect, are some cases of connection problems in this field, although not the only ones, Where in addition to listing them they offer the solution to each of them:
Message 'Obtaining IP Address':
If you do not connect after this message, you can check several things: that you do not have a fixed IP (it could be using another device in your network), turn the router off and on (it would also be advisable to do it with the devices) at that time connected) or, ultimately, check that our connection has been configured to limit the number of devices that can connect to it.
Connection saved, but does not connect to Wi-Fi:
It is usually a common error when the password is typed incorrectly. But it can also be due to the type of network encryption, which is insecure (WEP) and our devices can not support it. If so, simply change it in the router.
Wifi connection symbol in gray:
to solve this problem you can go to the Wi-Fi settings in the mobile and press for a long time on the network to which we want to connect. There you have to select 'Modify network' and activate the advanced options. In 'IPv4 settings' you have to change the protocol to 'static IP' and make sure that DNS 1 is 8.8.8.8 and DNS 2 is 8.8.4.4. Another option, more drastic is to restore the factory values in the terminal.
Connection disabled:
as in the previous case, it will be necessary to go to the 'IPv4 settings'. In the 'IPv4 Address' section, the number after the last point must be changed to one that is not occupied. In 'Gateway' and in 'DNS 1' you can test with the IP of the router or 192.168.1.254.
It does not connect to our Wi-Fi network:
if it is not solved by restarting the router, it could be due to a collapse in our band. Simply change the frequency of our Wi-Fi to a less collapsed band.
It does not detect the Wi-Fi network:
if after configuring the network from the settings it still does not work, it can happen that it is a defect of the router's antenna or of the mobile itself (this last case can be verified by trying to connect to another network).
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