My iPhone 6 with iOS 8.3 connects to my Wi-Fi but theres no icon on top and it doesnt work

Yesterday it was working 100%, but today I woke up and where the Wi-Fi icon should be it says E (because inside my house i dont get 3G or 4G), I went to Settings > Wi-Fi and its connected, I deactivated and activated it, put on an off plane mode, I restarted my iPhone, normally and pressing Power and Home buttons, restarted network settings, right now im restoring the whole software and I hope it gets fixed. Any help?

My sisters iPhone 6 its connected to our Wi-Fi and its working