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My iphone 7 plus takes about 3 minutes to start wi-fi after i turn the phone off also when i enter the about tab before the wi-fi activates the tab won’t open and freezes out , it was restored to factory settings recently aswell , does anyone have an idea of what this problem may be?

does them mic work my 7 plus does this and the mic also dosen’t work (I now it has audio ic disease) I think the wifi taking longer to turn on is part of the simptoms