Not really, no. Though the wug sites have powerful antennas your phone should pick up the signal, but it will not be able to transmit back to the wug site.
Unless you are very close to an antenna it will not work. Same problem with laptops.
That is why you have to buy expensive kit to connect, simply because standard "off the shelf" wifi will not be able to connect kilometers away
On that note, when I am home my phone is on the wug yes. I have a standard dlink wireless router for my home, so the laptop/phone/whatever can connect to it is also connected to the wug. But that router is connected to my wug kit that connects to a site about 4km away.