Оригинальный сообщение: hectordtruong ,
#3 connector has nothing to do with reception. That is ear speaker and proximity sensor territory. Your reception issue lies within the #7 connector, I bet that came loose. Also, I believe you received a defective battery, it happens all the time. Call ifixit and they will send another one. The sticker does nothing for the phone except deter people from tampering.