[Q] A REAL charger port actually made by Samsung?

I have recently replaced the DC In (charger port) board, and as many have experienced, I am having severe degradation of cellular reception.

Obviously the 'OEM' part that I have purchased isn't a real OEM, of this wouldn't be happening.

I am now posting this thread in hope that I can be directed to a seller in the United States that has ACTUAL Samsung factory parts, so I can fix this phone properly.

If you don't have an answer to where I could buy either (1) an actual Samsung part for a reasonable price or (2) a non Samsung part that won't degrade my cellular quality, then please don't respond.

Thank you