You can always tweak your Wi-Fi settings—things like the SSID, the password, encryption levels, and so on. I just wanted to point out that if it's enabled, you can connect to and set up the router wirelessly... you don't necessarily need an Ethernet cable for that.
Otherwise, like others here have mentioned, getting the Wi-Fi actually active usually requires either a physical connection or a call to your ISP. But honestly, most modern routers that support wireless sharing come with the AP already configured and turned on by default.
Roger Gray8 said:Are you blind or what? Seriously, how can you not see that?
If I had interpreted the original post that way, I probably wouldn't have bothered replying at all.