Tp4 only uses 5ghz wifi, cuz don't wanna git Cancer. less wall penetration = m0ar safe ?
well 5GHz is more energy, so... logically less safe, but then 2.4 is not actually unsafe (or at least no one has managed to prove it without a huge paycheck from someone who want to sell some competing stuff) although so many things can be causing cancer at any one time, you should cut all wireless to be sure, and not plug any switching power supply to be extra sure, then go live in a place with very low background radiation in a lead lined house, and never get out. and well most powerful canserigen of all the oxygen, you should also stop breathing.
no that i have taken that a bit too far, the main reason why one would still use 2.4GHz is that it is more compatible, the main reason for 5GHz is that it is faster. where i live our internet is slow and our isp does not even give us the option for a 5GHz capable router, old crappy 2.4 for old crappy internet, to be fair, with internet running at 600kb/s i will not saturate the wifi.