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well i already did a factory settings reset before and i bought the phone from another countryTry doing a factory reset as ur problem is not normal... if it didn't wrk then go to the service center and get ur phone replaced...

i know that it works after restarting but i want to know how to fix thati got this problem on my ace too..
restarting your phone should worked..
but, it doesn't exactly make your wi-fi not gonna do it again
at least you can use your wi-fi after restarting it..
i also hv this problem..wifi error..sometimes when i try to turn wifi on from the notification bar it dosent work when i go to wifi settings and try to turn it on it says error and it dosent work again unless i restart the phone![]()
after do this...the problem will solve?solve is to dial: *#*#526#*#*