Ted Max, Thanks for the infos; I know the frequencies, I "made" a typing mistake on my previous post, eventhough a wifi frequency is higher therefore a larger emission of electromagnetic energy, on a wifi point there is usually less concentration of transmitter/receiver "devices" at any one time whereas on a single mobile phone mast there are usually hundreds of mobile phones at the same time so the emission concentration is much higher. So if we install let's say 4 wifi points within few hundred yards from eachother in the Lordship Lane area and each point has 30 computer on at the same time, the total will be 120 devices at any one time = same average on a phone mast but with a wifi higher frequency though more energy radiation. That's why full public wifi coverage is very unhealthy. Anyway NO FEAR = it's only radio waves !!! (tu)