I should emphasize that this is a known issue with iPhone 12 and mention the audio IC problem specifically, as that's a common hardware flaw in this model. The repair cost range and Apple's flat rate will help set expectations. The conclusion should reinforce that this is likely hardware-related and professional repair is the probable solution, while still guiding them through all possible self-fixes first.

I should emphasize that this is a known issue with iPhone 12 and mention the audio IC problem specifically, as that's a common hardware flaw in this model. The repair cost range and Apple's flat rate will help set expectations. The conclusion should reinforce that this is likely hardware-related and professional repair is the probable solution, while still guiding them through all possible self-fixes first.