Recently, My Galaxy S4 will not make or receive calls or texts while connected to my home WIFI. The status bar WIFI icon is highlighted and the Connection Bar icon has 0 bars. When I check the WIFI connection in "settings" the status is connected and shows very strong strength. Any time I try to make a call or send a text I get a "no network error message" and basically I am dead in the water as far as cell phone use is concerned. My S4 is my primary phone for home and business use and is very inconvenient when I am missing calls, etc. I have done a phone reset and removed SIM Card as well as a rest. Please advise.