There seems to be some kind of denial of service/packet flooding from all 3 of my android phones when wifi is switched on. It seems to have happened after going to cell data or even the att uverse router/gateway, which I never used before. I saw comcast vans here 2 times too as it may be slowing down comcast internet too thru those xfinitywifi access points. Slows both systems down (comcast internet and att uverse) about 4 meg in download speed. It's on att and tmobile.