Unhappy [Q] wi-fi error

hello to every body.
1 week ago i wanted to overclock my phone cpu and i didn't know any thing and i installed a version of kernel.
after that because my phone hanged a lot , i reset it to the factory and after that when i wanted turn my wi-fi on , i couldn't.
this is a picture of the location of wi-fi:

what shoul i do?
thanks.
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