All three Wi-Fi related domains expire in January, 2016 and are currently home to "placeholder" pages hosted at MDDHosting. If you have any questions please feel free to contact me.
wi-ficalls.com - Originally registered in 2009, this domain gets some trickle type-in traffic. There was a small page on this domain previously which you can check on Wayback Machine.
wi-fimobiles.com - Originally registered in 2006, and has been bought and sold a few times since then. I'm not sure if there was an established site here in the past or not.
wi-fitelefon.com - I registered it back in January, 2014. Lots of searches for this one, as "telefon" means "telephone" in a variety of European languages.