This sounds like a scam. The frequencies used by cell phones, and those used by WiFi routers, are (a) different, and (b) the subject of much study, with the con

This sounds like a scam. The frequencies used by cell phones, and those used by WiFi routers, are (a) different, and (b) the subject of much study, with the conclusion that there's no prospect of interference between then. If someone from AT&T really intended to fight with you about your router, it would be national headlines, because it would imply that the FCC got it wrong. In fact, if this were true, it should be national headlines. http://en.wikipedia.org/wiki/Cellular_frequencies#Frequency_bands_used_by_GSM http://en.wikipedia.org/wiki/Cellular_frequencies#Frequency_... http://en.wikipedia.org/wiki/List_of_WLAN_channels http://en.wikipedia.org/wiki/List_of_WLAN_channels Not to oversimplify, but cell phones don't require access to the same frequencies that are used by WiFi routers.