Apple
Apple can now supposedly repair the bottom-right microphone on the iPhone 15 and iPhone 15 Plus. This microphone can now be replaced individually by Apple Stores and Apple Authorized Service Providers, instead of replacing the entire mid-frame chassis as before. This change should reduce the repair costs for customers and the environmental impact on Apple.
However, this new procedure only applies to the lower-end iPhone 15 models. For the iPhone 15 Pro and iPhone 15 Pro Max, and other iPhone models, the bottom-right microphone still requires a mid-frame replacement. The same is true for all other microphones on iPhones, such as the ones near the earpiece and rear camera.