How do I connect to WiFi?

The most likely scenario is that airplane mode is on. You can easily disable it in "General" in your settings.

Clear data on the WiFi calling settings and service by going to settings, general, application manager, and scrolling to the WiFi settings (under all).

No you should not need WiFi. If any sort of connections would be needed it would probably be an OTA (Over The Air) connection, so keep mobile data turned on...

Go to the app store, go the page of the app you wish to update, click "update".

Go to the setting, then look for WiFi settings, then just turn off the WiFi.

Interior ceiling lights usually have no ground wire connection, unless there is a receptacle in addition to the socket. Remember that the "hot" (black or red) wire goes to the...

You can change the password by contacting your internet service provider. Once you've done that, all connected devices will have to reenter the password.

Go to internet settings, click on your WiFi, and enter your WiFi password if you have one. If not, you will be given the option to create one, and you...

Try changing the DNS server setting to point to Google's, which is 008.008.008.008.

Rest assured that your phone will operate just fine without active service from a carrier, leaving it as a WiFi-only device.