iPhone 7 mic issues after iOS 11.3 update? Apple is aware

According to MacRumors, you might be able to get it fixed for free.

Sean Hollister Senior Editor / Reviews
When his parents denied him a Super NES, he got mad. When they traded a prize Sega Genesis for a 2400 baud modem, he got even. Years of Internet shareware, eBay'd possessions and video game testing jobs after that, he joined Engadget. He helped found The Verge, and later served as Gizmodo's reviews editor. When he's not madly testing laptops, apps, virtual reality experiences, and whatever new gadget will supposedly change the world, he likes to kick back with some games, a good Nerf blaster, and a bottle of Tejava.
Sean Hollister

Did you recently update to iOS 11.3? If you're chatting with someone on your iPhone 7 or iPhone 7 Plus , and they're having trouble hearing you speak, you might want to let Apple have a look. They could even fix it for free.

MacRumors says it's obtained an internal Apple Authorized Service Provider document that reportedly details a known issue with some iPhone 7 and iPhone 7 Plus handsets -- one where the mic stops working during phone calls and FaceTime video chats, and where the speakerphone button might stop working.

According to a source who spoke to AppleInsider, it's an extremely rare issue, and one that might be easy to fix. Apple technicians are reportedly being instructed to disconnect Bluetooth headsets or other audio accessories first to see if that solves the problem. (You might as well do that yourself.)

But if that speakerphone button is grayed out, there might be a hidden message in the diagnostics menu that reads "device could not detect dock" or "accessory not supported," at which point Apple can try to repair your phone -- and if you're not covered under warranty, MacRumors says the document allows Apple service providers to make a warranty exception. 

Potentially, you could get it fixed for free.

Apple didn't immediately respond to a request for comment.

Here's the good stuff you get with iOS 11.3.