Did you change just the lightning connector? Or the whole charge port cable assembly?
If the whole cable, more than likely there is an issue with the bottom microphone, which is part of this assembly on the vast majority of iPhones. At least as far back as the iPhone 5, but possible further back than that,
This could be a simple as the microphone is not properly aligned, or the connection between the cable assembly and the logic board is not good. See if a simple disconnect and reconnect of the cable helps. But it’s more likely in my experience that the replacement charge port assembly has a bad microphone. Or that when it was installed, there was some minute damage to the cable, preventing the mic signal from getting to the logic board at all.
Which iPhone is it specifically?
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Hi,
What is the model number of the iPhone?
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