Share your experience!
Hey there Xperia J owners!
Like many owners of the Xperia J in the middle east,I've been suffering from the fact the my phone doesn't detect any wi-fi signal whatsoever,however,I've managed to fix this issue(without any help from anyone here) using 2 simple steps:
1.Factory reset(with erasing internal memory)
2.WIPED internal memory with an app called "Forever gone"(Other wiping apps not tested so I don't know if they would work)
And BOOM,it worked!
Not at all
But to avoid losing your data,simply back them up on a computer 
you do not back up your data from the computer repair process when the problem will be solved