I've noticed this happening randomly lately. Sometimes if my 5.8 ghz phone is near me and I use it, my wifi signal drops dead on my macbook (my only mac). Also, when it happens, the signal on the phone sounds gargly (the dial tone). This only happens occasionally. I then have to reconnect it. Otherwise, it's fine. BTW, my phone is Voip but it's plugged into the lan jack of another router (being used as an access point). Not sure if this is related, but don't think it is. Any ideas? Could my 5.8 phone really be a 5? Very odd!