mobile

Good day mates. I have a problem with my XU; whenever I turn on the Wi-Fi on my phone, it gets stuck on a boot loop. May it be on a stock ROM or a custom ROM (ICS, KK, et al.) I've yet to try GB.

I've read several threads in XDA and Google about this and no one has provided a fix or a diagnosis. There is quite a lot of issues like mine not just on the Xperia U, but other Xperias as well. Could this be a hardware problem? Does anyone know where can I locate the file responsible for WiFi so it doesn't get turned on accidentally and having to reflash the whole ROM again?

Thanks fellow XDA members for your future responses! :D