I know this is the wrong forum for serious answers, but what the heck.
I already have a 2.4ghz phone
2.4GHz wireless networks can be VERY susceptible to interference from other 2.4GHz devices.
Proceed with caution! If possible, borrowing the WiFi equipment first, or at least make darn sure you can return it. Or consider getting rid of the phone (especially if you don't like it anyway).