Hello, I have a sprint Samsung s4 SPH-L720. I rooted my phone in October and now I cannot turn on the WiFi. It gives a security message and asks me to reboot. Has anyone heard of this? Someone in one of the other forums suggested to another user to use Odin: Return to Stock, fix soft brick, but it for T-Mobile. Is there one for sprint? Cannot anyone else suggest a fix? Thanks in advance.