I have set wi-fi to Share the Air (free strong web access in area). Have all bars. When I go to a web page via safari or weather or stock, the wi-fi signal goes off and is replaced by slower edge E. It had worked fine for days. I tried to reset network settings and restart. I went to airplane mode, turned off and on and wi-fi signal reappeared but when I selected the wi-fi, and went to safari the edge replaced the wi-fi signal. Please assist. TY