Why won't my iphone 4 connect to the Wi-Fi?

I recently broke my iPhone 4 screen and replaced it myself. When i replaced it, i'm pretty sure i put everything back together right, but my iphone hasn't been able to connect with my home Wi-Fi since. The Wi-Fi works perfectly fine, the rest of my family can connect to it with no problem, its just my phone. I've tried everything… But my phone still won't connect to the home Wi-Fi. I turned on the Wi-Fi but no networks are showing up and i did turn on ask to join networks. Can anybody please tell me what's wrong with my phone? Did i put my phone back together wrong? I also lost my sim card but i don't think that has to do with the Wi-Fi not connecting.

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