Front speaker only works with fake flex cable

Hello guys,

I broke my flex cable for the front camera, sensors etc. during a screen replacement. After that I bought a “genuine” flex cable replacement from Ebay. I think it is a fake, because I compared to my original one. But it worked so far except the auto-brightness option wasn’t in the settings anymore. Then I noticed that the camera was a little blurry, not focusing right and the quality was bad. So I bought another new original flex cable from Ebay, this time 100% genuine and the camera quality is perfect, but now with this flex cable the front speaker isn’t working. I thought maybe the flex cable was faulty and bought another one original from a different seller, but the same problem- front speaker isn’t working.

The front speaker isn’t faulty, because the funny thing is, if I use my fake flex cable everything works perfectly fine again, except bad camera quality.I asked both of the sellers and both told me that their product is tested and working 100%.

Please help!