Why is my earpiece not working?

So I fixed my iPhone a while back and I still remembered that before I had done the fix, the earpiece worked perfectly fine. However, now that the phone is fixed I dont hear anything from the earpiece whatsoever. The only means of communication through the phone are either using the speaker phone, bluetooth, or just headphones. I am contemplating on getting a new earpiece to see if that'll work, but I'd rather ask first to see what you guys think. Other than that everything works great on the phone! So..any thoughts...