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    Default Impossible to switch on wifi on samsung s3

    Hi guys,
    I need your help please. The problem is simple, while everything was working perfectly on my device the wifi just started to stop working on my S3.
    What is basically happening is every time I turn on the wifi via the icon at the top but it turns off immediately.
    I tried to do a full reset of the device, but nothing happened, the problem is the same.
    On the other hand I do have the mobile network on 3G but when I want to turn on wifi it turns on and goes out after a few seconds.
    I read some articles like [GUIDE] Troubleshooting Wi-Fi Connection Problems but it can't solve my problem unfortunately since the problem is I can't enable Wifi on my dice.
    I also checked by typing * # 011 # that I have the option WIFI Power save mode is Off.
    I really do not know what to do, if anyone has had the problem and know the solution it will be really cool.
    As I said it occurred without any modification on my side so it's very strange.

    The version of android i have is: 4.1.2
    The version of the device: GT-I9300
    The version of the kernel: 3.0.31

    I'm really desperate
    Thanks in advance

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