Phone takes AGES to boot and WiFi doesn't work.
My Samsung Galaxy S4 I9505 takes ages to boot and does not turn WiFi on at all. And when I say it takes ages to boot I mean it takes ages for the phone to get past the initial samsung galaxy s4 i9505 screen.
I have tried a factory reset but no luck.
The problem has come from flashing backwards to firmware that is easier to root (due to Knox). I am using TWRP to try and restore the firmware to a working order, but I'm not having much luck.
Any suggestions are greatly appreciated.