|Photo credit: http://blog.clove.co.uk/wp-content/uploads/2014/09/Sony-Xperia-Z3-Compact-back.png|
It all began one fateful afternoon, when I was dorking around on my phone instead of doing my homework. I was probably looking at dank memes on imgur or something equally pointless. Regardless, the wifi disconnected from my home network, and the wifi shut off. I thought nothing of it, as our home wifi serves upwards of 25 devices and does that from time to time. So I go around and shut off all of the stuff I'm not using (iPad, Vita, Desktops) and try to reconnect. It would reconnect, but then disconnect shortly after. I restart it, and the connection holds until the next morning. "Ah well", I thought, "I can't connect to the school's wifi anyway, so I'll fix it when I get home". I come home after school and do a factory reset. This holds for about an hour, then fails. Try it again, it doesn't work at all. I try using the Xperia PC Companion, and the same thing happens. Five minutes or so, then fails, never to work again. I try using the "Testing Menu" code from the calling app, and the same thing happens. I try FXR Wifi Fix and Rescue, and that will get about halfway through and the app will hang. I run the diagnostics thing in "Settings > About > Diagnostics" or something like that, and it says bluetooth is bad but Wifi is a-OK. Which it clearly isn't, I might add. I then twiddled my thumbs for a bit, and gave up. This was about a month ago, and the problem still hasn't been fixed, through my efforts or any other supreme being.
I decided to broaden my search. Previously, all of my google entries had been something along the lines of "Fix sony xperia z3c wifi" or "xperia z3c wifi problem"
I have a theory. I think it is a hardware problem. Most of the forum posts said that the wifi stopped working shortly after a large software update. Updates where the wifi chip is used a lot, and gets fairly warm. Updates where, if not properly ventilated, the phone could get hot enough to reflow solder. I know for a fact that my phone got really, really hot during my
The fact that this happens on what appears to be a wide range of devices is still a bit befuddling. I'll also admit that it is pure speculation beyond this point (and really a lot before now, too). I think that the phones are not designed to disperse as much heat as they give off with a case on. That last part is important, and you can tell because it's italicized. The cases people use hold in a lot of heat, and make wonderful insulators. I can confidently say this because I used my phone several times without a case and it nearly burned my hand, but never even came close to doing that with a case on under similar loads. I'm not suggesting you go and throw out whatever cases you have, I would however suggest that you take off the case and put it in a cool area when doing a lot of downloading to prevent accidental reflowing of the wifi chip.
Again, this is all pure speculation, and if you have any other theories about why this happens so frequently please do not hesitate to leave a comment. The best way to figure this thing out is to do it together.