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Hi i had issue with iphone 7 plus after replace screen client came back and said ear pice not working i bought ear pice and few flex cables and replaced as every one said 1 flex cable ear piece is working no camera 2 nd flex camera works not earpiece any solution???? i have tried hard reset i have tried replace flex cable i have tried little tape inside Please help
Are you getting parts for a reputable seller? It sounds to me like the part you are trying to replace is faulty and the replacement parts are not that good. Some functions are working and that is good letting you know that the hoard is fine. This is because you say it works with one cable and not the other. I would like at find a replacement for a reputable seller such as iFixit. iPhone 7 Plus Front Camera and Sensor Cable Simply use the same ear speaker that you know is working. This should solve you problem. Also makes sure the cable is lined up perfectly making contact with all the ear speaker connections.
As the iPhone Guy suggests, you need known working test parts to effectively troubleshoot. Then once the problem is found you can just replace the faulty part.
Try another flex or an original flex a lot of those flexors are bad from the factory
