What do i do with a defective Wi-Fi for iphone 4s?

I don't wanna get a new phone but is there a way i can fix it cause its bothering me. And this happned right after i replaced my cracked screen any solutions?

You have probably dislodged or damaged the Wi-Fi antenna, they are cheap to purchase and as you have already replaced the screen you know how to access it, here is video to show you how

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